diff --git a/src/ImageSharp/Color/Color.Conversions.cs b/src/ImageSharp/Color/Color.Conversions.cs
index ec25be5d61..bbb848867d 100644
--- a/src/ImageSharp/Color/Color.Conversions.cs
+++ b/src/ImageSharp/Color/Color.Conversions.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
diff --git a/src/ImageSharp/ColorSpaces/CieLab.cs b/src/ImageSharp/ColorSpaces/CieLab.cs
index 831555d12d..2346b395c0 100644
--- a/src/ImageSharp/ColorSpaces/CieLab.cs
+++ b/src/ImageSharp/ColorSpaces/CieLab.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -124,7 +123,7 @@ public readonly struct CieLab : IEquatable<CieLab>
     public override string ToString() => FormattableString.Invariant($"CieLab({this.L:#0.##}, {this.A:#0.##}, {this.B:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is CieLab other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is CieLab other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/CieLch.cs b/src/ImageSharp/ColorSpaces/CieLch.cs
index 78aeeb807c..48e8e2c6d9 100644
--- a/src/ImageSharp/ColorSpaces/CieLch.cs
+++ b/src/ImageSharp/ColorSpaces/CieLch.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -128,7 +127,7 @@ public readonly struct CieLch : IEquatable<CieLch>
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
-    public override bool Equals(object obj) => obj is CieLch other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is CieLch other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/CieLchuv.cs b/src/ImageSharp/ColorSpaces/CieLchuv.cs
index 6c116f5811..4d47be5aa3 100644
--- a/src/ImageSharp/ColorSpaces/CieLchuv.cs
+++ b/src/ImageSharp/ColorSpaces/CieLchuv.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -125,7 +124,7 @@ public readonly struct CieLchuv : IEquatable<CieLchuv>
     public override string ToString() => FormattableString.Invariant($"CieLchuv({this.L:#0.##}, {this.C:#0.##}, {this.H:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is CieLchuv other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is CieLchuv other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/CieLuv.cs b/src/ImageSharp/ColorSpaces/CieLuv.cs
index 9cbb9d6ac6..04bc96cfa2 100644
--- a/src/ImageSharp/ColorSpaces/CieLuv.cs
+++ b/src/ImageSharp/ColorSpaces/CieLuv.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -125,7 +124,7 @@ public readonly struct CieLuv : IEquatable<CieLuv>
     public override string ToString() => FormattableString.Invariant($"CieLuv({this.L:#0.##}, {this.U:#0.##}, {this.V:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is CieLuv other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is CieLuv other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/CieXyy.cs b/src/ImageSharp/ColorSpaces/CieXyy.cs
index fdfc52ce6c..6b7d2e6cbd 100644
--- a/src/ImageSharp/ColorSpaces/CieXyy.cs
+++ b/src/ImageSharp/ColorSpaces/CieXyy.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -89,7 +88,7 @@ public readonly struct CieXyy : IEquatable<CieXyy>
     public override string ToString() => FormattableString.Invariant($"CieXyy({this.X:#0.##}, {this.Y:#0.##}, {this.Yl:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is CieXyy other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is CieXyy other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/CieXyz.cs b/src/ImageSharp/ColorSpaces/CieXyz.cs
index bfe71a8946..2ac9c9f286 100644
--- a/src/ImageSharp/ColorSpaces/CieXyz.cs
+++ b/src/ImageSharp/ColorSpaces/CieXyz.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -92,7 +91,7 @@ public readonly struct CieXyz : IEquatable<CieXyz>
     public override string ToString() => FormattableString.Invariant($"CieXyz({this.X:#0.##}, {this.Y:#0.##}, {this.Z:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is CieXyz other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is CieXyz other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/Cmyk.cs b/src/ImageSharp/ColorSpaces/Cmyk.cs
index 63009ddae6..a5aacf38ad 100644
--- a/src/ImageSharp/ColorSpaces/Cmyk.cs
+++ b/src/ImageSharp/ColorSpaces/Cmyk.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -96,7 +95,7 @@ public readonly struct Cmyk : IEquatable<Cmyk>
     public override string ToString() => FormattableString.Invariant($"Cmyk({this.C:#0.##}, {this.M:#0.##}, {this.Y:#0.##}, {this.K:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Cmyk other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Cmyk other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/CieXyChromaticityCoordinates.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/CieXyChromaticityCoordinates.cs
index fa09a230bc..2cc785d53b 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/CieXyChromaticityCoordinates.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/CieXyChromaticityCoordinates.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Runtime.CompilerServices;
 
@@ -74,7 +73,7 @@ public readonly struct CieXyChromaticityCoordinates : IEquatable<CieXyChromatici
         => FormattableString.Invariant($"CieXyChromaticityCoordinates({this.X:#0.##}, {this.Y:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is CieXyChromaticityCoordinates other && this.Equals(other);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs
index 85258d7a63..625e6c551a 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion;
 
@@ -73,7 +72,7 @@ public readonly struct RgbPrimariesChromaticityCoordinates : IEquatable<RgbPrima
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is RgbPrimariesChromaticityCoordinates other && this.Equals(other);
     }
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
index 87b0ce8065..e95f1f2b47 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs
@@ -34,7 +34,7 @@ public sealed class GammaWorkingSpace : RgbWorkingSpace
     public override float Expand(float channel) => GammaCompanding.Expand(channel, this.Gamma);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         if (obj is null)
         {
diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs
index 685032cbdb..f22f2ff1fa 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpace.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.ColorSpaces.Conversion;
 
@@ -53,7 +52,7 @@ public abstract class RgbWorkingSpace
     public abstract float Compress(float channel);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         if (obj is null)
         {
diff --git a/src/ImageSharp/ColorSpaces/Hsl.cs b/src/ImageSharp/ColorSpaces/Hsl.cs
index d539a7a805..cf18c70c78 100644
--- a/src/ImageSharp/ColorSpaces/Hsl.cs
+++ b/src/ImageSharp/ColorSpaces/Hsl.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -90,7 +89,7 @@ public readonly struct Hsl : IEquatable<Hsl>
     public override string ToString() => FormattableString.Invariant($"Hsl({this.H:#0.##}, {this.S:#0.##}, {this.L:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Hsl other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Hsl other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/Hsv.cs b/src/ImageSharp/ColorSpaces/Hsv.cs
index d6240cb130..87c16c0b6a 100644
--- a/src/ImageSharp/ColorSpaces/Hsv.cs
+++ b/src/ImageSharp/ColorSpaces/Hsv.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -88,7 +87,7 @@ public readonly struct Hsv : IEquatable<Hsv>
     public override string ToString() => FormattableString.Invariant($"Hsv({this.H:#0.##}, {this.S:#0.##}, {this.V:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Hsv other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Hsv other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/HunterLab.cs b/src/ImageSharp/ColorSpaces/HunterLab.cs
index 6f9294bf8d..516574b098 100644
--- a/src/ImageSharp/ColorSpaces/HunterLab.cs
+++ b/src/ImageSharp/ColorSpaces/HunterLab.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -123,7 +122,7 @@ public readonly struct HunterLab : IEquatable<HunterLab>
     public override string ToString() => FormattableString.Invariant($"HunterLab({this.L:#0.##}, {this.A:#0.##}, {this.B:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is HunterLab other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is HunterLab other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/LinearRgb.cs b/src/ImageSharp/ColorSpaces/LinearRgb.cs
index 0727f38123..49c7814a0e 100644
--- a/src/ImageSharp/ColorSpaces/LinearRgb.cs
+++ b/src/ImageSharp/ColorSpaces/LinearRgb.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -132,7 +131,7 @@ public readonly struct LinearRgb : IEquatable<LinearRgb>
     public override string ToString() => FormattableString.Invariant($"LinearRgb({this.R:#0.##}, {this.G:#0.##}, {this.B:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is LinearRgb other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is LinearRgb other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/Lms.cs b/src/ImageSharp/ColorSpaces/Lms.cs
index a33ad189a0..99210ff6e4 100644
--- a/src/ImageSharp/ColorSpaces/Lms.cs
+++ b/src/ImageSharp/ColorSpaces/Lms.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -93,7 +92,7 @@ public readonly struct Lms : IEquatable<Lms>
     public override string ToString() => FormattableString.Invariant($"Lms({this.L:#0.##}, {this.M:#0.##}, {this.S:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Lms other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Lms other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/Rgb.cs b/src/ImageSharp/ColorSpaces/Rgb.cs
index 2b6485baf6..55052a710e 100644
--- a/src/ImageSharp/ColorSpaces/Rgb.cs
+++ b/src/ImageSharp/ColorSpaces/Rgb.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -153,7 +152,7 @@ public readonly struct Rgb : IEquatable<Rgb>
     public override string ToString() => FormattableString.Invariant($"Rgb({this.R:#0.##}, {this.G:#0.##}, {this.B:#0.##})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Rgb other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Rgb other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/ColorSpaces/YCbCr.cs b/src/ImageSharp/ColorSpaces/YCbCr.cs
index 035306a7b3..acb59388fb 100644
--- a/src/ImageSharp/ColorSpaces/YCbCr.cs
+++ b/src/ImageSharp/ColorSpaces/YCbCr.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -89,7 +88,7 @@ public readonly struct YCbCr : IEquatable<YCbCr>
     public override string ToString() => FormattableString.Invariant($"YCbCr({this.Y}, {this.Cb}, {this.Cr})");
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is YCbCr other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is YCbCr other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/Formats/Gif/Sections/GifGraphicControlExtension.cs b/src/ImageSharp/Formats/Gif/Sections/GifGraphicControlExtension.cs
index 0352d7447f..52052021fc 100644
--- a/src/ImageSharp/Formats/Gif/Sections/GifGraphicControlExtension.cs
+++ b/src/ImageSharp/Formats/Gif/Sections/GifGraphicControlExtension.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -107,7 +106,7 @@ internal readonly struct GifGraphicControlExtension : IGifExtension, IEquatable<
         return value;
     }
 
-    public override bool Equals(object obj) => obj is GifGraphicControlExtension extension && this.Equals(extension);
+    public override bool Equals(object? obj) => obj is GifGraphicControlExtension extension && this.Equals(extension);
 
     public bool Equals(GifGraphicControlExtension other)
         => this.BlockSize == other.BlockSize
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
index 7edf6ba6a2..3bd5d28e74 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -471,7 +470,7 @@ internal partial struct Block8x8F : IEquatable<Block8x8F>
         && this.V7R == other.V7R;
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => this.Equals((Block8x8F)obj);
+    public override bool Equals(object? obj) => this.Equals((Block8x8F?)obj);
 
     /// <inheritdoc />
     public override int GetHashCode()
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs
index 44ad92311d..c9ee55cd77 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
 
@@ -90,7 +89,7 @@ internal readonly struct AdobeMarker : IEquatable<AdobeMarker>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is AdobeMarker other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
index 7ee50ce9a4..42dcf7200a 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/JFifMarker.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using SixLabors.ImageSharp.Metadata;
 
@@ -110,7 +109,7 @@ internal readonly struct JFifMarker : IEquatable<JFifMarker>
             && this.YDensity == other.YDensity;
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is JFifMarker other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is JFifMarker other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Formats/Png/PngTextData.cs b/src/ImageSharp/Formats/Png/PngTextData.cs
index bf30013140..8ef4f1821d 100644
--- a/src/ImageSharp/Formats/Png/PngTextData.cs
+++ b/src/ImageSharp/Formats/Png/PngTextData.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Formats.Png;
 
@@ -99,7 +98,7 @@ public readonly struct PngTextData : IEquatable<PngTextData>
     /// true if <paramref name="obj"/> and this instance are the same type and represent the
     /// same value; otherwise, false.
     /// </returns>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is PngTextData other && this.Equals(other);
 
     /// <summary>
diff --git a/src/ImageSharp/Formats/Tiff/TiffBitsPerSample.cs b/src/ImageSharp/Formats/Tiff/TiffBitsPerSample.cs
index ffb5ee02cc..fb35ef2de3 100644
--- a/src/ImageSharp/Formats/Tiff/TiffBitsPerSample.cs
+++ b/src/ImageSharp/Formats/Tiff/TiffBitsPerSample.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Formats.Tiff;
 
@@ -126,7 +125,7 @@ public readonly struct TiffBitsPerSample : IEquatable<TiffBitsPerSample>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is TiffBitsPerSample sample && this.Equals(sample);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Memory/RowInterval.cs b/src/ImageSharp/Memory/RowInterval.cs
index 4601ef9ff4..90a88d735a 100644
--- a/src/ImageSharp/Memory/RowInterval.cs
+++ b/src/ImageSharp/Memory/RowInterval.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Memory;
 
@@ -69,7 +68,7 @@ public readonly struct RowInterval : IEquatable<RowInterval>
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return !ReferenceEquals(null, obj) && obj is RowInterval other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTag.cs b/src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTag.cs
index 4f0c18d543..ea0b8060d5 100644
--- a/src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTag.cs
+++ b/src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTag.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Exif;
 
@@ -34,7 +33,7 @@ public abstract partial class ExifTag : IEquatable<ExifTag>
     public static bool operator !=(ExifTag left, ExifTag right) => !Equals(left, right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         if (obj is ExifTag value)
         {
@@ -45,7 +44,7 @@ public abstract partial class ExifTag : IEquatable<ExifTag>
     }
 
     /// <inheritdoc/>
-    public bool Equals(ExifTag other)
+    public bool Equals(ExifTag? other)
     {
         if (other is null)
         {
diff --git a/src/ImageSharp/Metadata/Profiles/Exif/Values/EncodedString.cs b/src/ImageSharp/Metadata/Profiles/Exif/Values/EncodedString.cs
index b588344784..cd5d1dc626 100644
--- a/src/ImageSharp/Metadata/Profiles/Exif/Values/EncodedString.cs
+++ b/src/ImageSharp/Metadata/Profiles/Exif/Values/EncodedString.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Exif;
 
@@ -101,7 +100,7 @@ public readonly struct EncodedString : IEquatable<EncodedString>
     public static bool operator !=(EncodedString left, EncodedString right) => !(left == right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is EncodedString other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is EncodedString other && this.Equals(other);
 
     /// <inheritdoc/>
     public bool Equals(EncodedString other) => this.Text == other.Text && this.Code == other.Code;
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccCurveSegment.cs b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccCurveSegment.cs
index 5c5f719a11..cebc58a259 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccCurveSegment.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccCurveSegment.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -22,7 +21,7 @@ internal abstract class IccCurveSegment : IEquatable<IccCurveSegment>
     public IccCurveSegmentSignature Signature { get; }
 
     /// <inheritdoc/>
-    public virtual bool Equals(IccCurveSegment other)
+    public virtual bool Equals(IccCurveSegment? other)
     {
         if (other is null)
         {
@@ -38,7 +37,7 @@ internal abstract class IccCurveSegment : IEquatable<IccCurveSegment>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => this.Equals(obj as IccCurveSegment);
+    public override bool Equals(object? obj) => this.Equals(obj as IccCurveSegment);
 
     /// <inheritdoc/>
     public override int GetHashCode() => this.Signature.GetHashCode();
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccFormulaCurveElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccFormulaCurveElement.cs
index 3d503a9eeb..068a4d11a1 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccFormulaCurveElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccFormulaCurveElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -67,7 +66,7 @@ internal sealed class IccFormulaCurveElement : IccCurveSegment, IEquatable<IccFo
     public float E { get; }
 
     /// <inheritdoc />
-    public override bool Equals(IccCurveSegment other)
+    public override bool Equals(IccCurveSegment? other)
     {
         if (base.Equals(other) && other is IccFormulaCurveElement segment)
         {
@@ -84,10 +83,10 @@ internal sealed class IccFormulaCurveElement : IccCurveSegment, IEquatable<IccFo
     }
 
     /// <inheritdoc />
-    public bool Equals(IccFormulaCurveElement other) => this.Equals((IccCurveSegment)other);
+    public bool Equals(IccFormulaCurveElement? other) => this.Equals((IccCurveSegment?)other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => this.Equals(obj as IccFormulaCurveElement);
+    public override bool Equals(object? obj) => this.Equals(obj as IccFormulaCurveElement);
 
     /// <inheritdoc />
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccOneDimensionalCurve.cs b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
index 2a785c6eb4..30935ebbe5 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccOneDimensionalCurve.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -37,7 +36,7 @@ internal sealed class IccOneDimensionalCurve : IEquatable<IccOneDimensionalCurve
     public IccCurveSegment[] Segments { get; }
 
     /// <inheritdoc />
-    public bool Equals(IccOneDimensionalCurve other)
+    public bool Equals(IccOneDimensionalCurve? other)
     {
         if (other is null)
         {
@@ -54,7 +53,7 @@ internal sealed class IccOneDimensionalCurve : IEquatable<IccOneDimensionalCurve
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => this.Equals(obj as IccOneDimensionalCurve);
 
     /// <inheritdoc />
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccParametricCurve.cs b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccParametricCurve.cs
index f9573439d2..0f1f4511d3 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccParametricCurve.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccParametricCurve.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -122,7 +121,7 @@ internal sealed class IccParametricCurve : IEquatable<IccParametricCurve>
     public float F { get; }
 
     /// <inheritdoc/>
-    public bool Equals(IccParametricCurve other)
+    public bool Equals(IccParametricCurve? other)
     {
         if (other is null)
         {
@@ -145,7 +144,7 @@ internal sealed class IccParametricCurve : IEquatable<IccParametricCurve>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccParametricCurve other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccResponseCurve.cs b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccResponseCurve.cs
index bd56bfec7a..45139aae2a 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccResponseCurve.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccResponseCurve.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 
@@ -46,7 +45,7 @@ internal sealed class IccResponseCurve : IEquatable<IccResponseCurve>
     public IccResponseNumber[][] ResponseArrays { get; }
 
     /// <inheritdoc/>
-    public bool Equals(IccResponseCurve other)
+    public bool Equals(IccResponseCurve? other)
     {
         if (other is null)
         {
@@ -64,7 +63,7 @@ internal sealed class IccResponseCurve : IEquatable<IccResponseCurve>
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => obj is IccResponseCurve other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccResponseCurve other && this.Equals(other);
 
     /// <inheritdoc />
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccSampledCurveElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccSampledCurveElement.cs
index 96d913b3b3..4a66b58c13 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccSampledCurveElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Curves/IccSampledCurveElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -28,7 +27,7 @@ internal sealed class IccSampledCurveElement : IccCurveSegment, IEquatable<IccSa
     public float[] CurveEntries { get; }
 
     /// <inheritdoc />
-    public override bool Equals(IccCurveSegment other)
+    public override bool Equals(IccCurveSegment? other)
     {
         if (base.Equals(other) && other is IccSampledCurveElement segment)
         {
@@ -39,11 +38,11 @@ internal sealed class IccSampledCurveElement : IccCurveSegment, IEquatable<IccSa
     }
 
     /// <inheritdoc />
-    public bool Equals(IccSampledCurveElement other)
-        => this.Equals((IccCurveSegment)other);
+    public bool Equals(IccSampledCurveElement? other)
+        => this.Equals((IccCurveSegment?)other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => this.Equals(obj as IccSampledCurveElement);
 
     /// <inheritdoc />
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/IccTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/IccTagDataEntry.cs
index fd740d7a3a..12228f3f58 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/IccTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/IccTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -41,13 +40,13 @@ public abstract class IccTagDataEntry : IEquatable<IccTagDataEntry>
     public IccProfileTag TagSignature { get; set; }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public virtual bool Equals(IccTagDataEntry other)
+    public virtual bool Equals(IccTagDataEntry? other)
     {
         if (other is null)
         {
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs
index 3efe7e5852..e9ca7277b2 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccBAcsProcessElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -20,10 +19,10 @@ internal sealed class IccBAcsProcessElement : IccMultiProcessElement, IEquatable
     }
 
     /// <inheritdoc />
-    public bool Equals(IccBAcsProcessElement other) => base.Equals(other);
+    public bool Equals(IccBAcsProcessElement? other) => base.Equals(other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => this.Equals(obj as IccBAcsProcessElement);
+    public override bool Equals(object? obj) => this.Equals(obj as IccBAcsProcessElement);
 
     /// <inheritdoc />
     public override int GetHashCode() => base.GetHashCode();
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs
index 596e526e51..67497fdf95 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccClutProcessElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -23,7 +22,7 @@ internal sealed class IccClutProcessElement : IccMultiProcessElement, IEquatable
     public IccClut ClutValue { get; }
 
     /// <inheritdoc />
-    public override bool Equals(IccMultiProcessElement other)
+    public override bool Equals(IccMultiProcessElement? other)
     {
         if (base.Equals(other) && other is IccClutProcessElement element)
         {
@@ -34,10 +33,10 @@ internal sealed class IccClutProcessElement : IccMultiProcessElement, IEquatable
     }
 
     /// <inheritdoc />
-    public bool Equals(IccClutProcessElement other) => this.Equals((IccMultiProcessElement)other);
+    public bool Equals(IccClutProcessElement? other) => this.Equals((IccMultiProcessElement?)other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => this.Equals(obj as IccClutProcessElement);
+    public override bool Equals(object? obj) => this.Equals(obj as IccClutProcessElement);
 
     /// <inheritdoc />
     public override int GetHashCode() => base.GetHashCode();
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
index 52edc84b0e..a90ceb8a6f 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccCurveSetProcessElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -23,7 +22,7 @@ internal sealed class IccCurveSetProcessElement : IccMultiProcessElement, IEquat
     public IccOneDimensionalCurve[] Curves { get; }
 
     /// <inheritdoc />
-    public override bool Equals(IccMultiProcessElement other)
+    public override bool Equals(IccMultiProcessElement? other)
     {
         if (base.Equals(other) && other is IccCurveSetProcessElement element)
         {
@@ -34,10 +33,10 @@ internal sealed class IccCurveSetProcessElement : IccMultiProcessElement, IEquat
     }
 
     /// <inheritdoc />
-    public bool Equals(IccCurveSetProcessElement other) => this.Equals((IccMultiProcessElement)other);
+    public bool Equals(IccCurveSetProcessElement? other) => this.Equals((IccMultiProcessElement?)other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => this.Equals(obj as IccCurveSetProcessElement);
+    public override bool Equals(object? obj) => this.Equals(obj as IccCurveSetProcessElement);
 
     /// <inheritdoc />
     public override int GetHashCode() => base.GetHashCode();
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs
index 3e88094554..99c27f2bb9 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccEAcsProcessElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -20,9 +19,9 @@ internal sealed class IccEAcsProcessElement : IccMultiProcessElement, IEquatable
     }
 
     /// <inheritdoc />
-    public bool Equals(IccEAcsProcessElement other) => base.Equals(other);
+    public bool Equals(IccEAcsProcessElement? other) => base.Equals(other);
 
-    public override bool Equals(object obj) => this.Equals(obj as IccEAcsProcessElement);
+    public override bool Equals(object? obj) => this.Equals(obj as IccEAcsProcessElement);
 
     /// <inheritdoc />
     public override int GetHashCode() => base.GetHashCode();
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs
index 694ab0531f..4c2923bce2 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMatrixProcessElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -38,7 +37,7 @@ internal sealed class IccMatrixProcessElement : IccMultiProcessElement, IEquatab
     public float[] MatrixOx1 { get; }
 
     /// <inheritdoc />
-    public override bool Equals(IccMultiProcessElement other)
+    public override bool Equals(IccMultiProcessElement? other)
     {
         if (base.Equals(other) && other is IccMatrixProcessElement element)
         {
@@ -50,11 +49,11 @@ internal sealed class IccMatrixProcessElement : IccMultiProcessElement, IEquatab
     }
 
     /// <inheritdoc />
-    public bool Equals(IccMatrixProcessElement other)
-        => this.Equals((IccMultiProcessElement)other);
+    public bool Equals(IccMatrixProcessElement? other)
+        => this.Equals((IccMultiProcessElement?)other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => this.Equals(obj as IccMatrixProcessElement);
 
     /// <inheritdoc />
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs
index daaf774e1b..1699271282 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/MultiProcessElements/IccMultiProcessElement.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -41,7 +40,7 @@ internal abstract class IccMultiProcessElement : IEquatable<IccMultiProcessEleme
     public int OutputChannelCount { get; }
 
     /// <inheritdoc/>
-    public virtual bool Equals(IccMultiProcessElement other)
+    public virtual bool Equals(IccMultiProcessElement? other)
     {
         if (other is null)
         {
@@ -58,7 +57,7 @@ internal abstract class IccMultiProcessElement : IEquatable<IccMultiProcessEleme
             && this.OutputChannelCount == other.OutputChannelCount;
     }
 
-    public override bool Equals(object obj) => this.Equals(obj as IccMultiProcessElement);
+    public override bool Equals(object? obj) => this.Equals(obj as IccMultiProcessElement);
 
     /// <inheritdoc />
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
index 865c3e2012..cc44762919 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -78,10 +77,10 @@ internal sealed class IccChromaticityTagDataEntry : IccTagDataEntry, IEquatable<
     public double[][] ChannelValues { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other) => other is IccChromaticityTagDataEntry entry && this.Equals(entry);
+    public override bool Equals(IccTagDataEntry? other) => other is IccChromaticityTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccChromaticityTagDataEntry other)
+    public bool Equals(IccChromaticityTagDataEntry? other)
     {
         if (other is null)
         {
@@ -97,7 +96,7 @@ internal sealed class IccChromaticityTagDataEntry : IccTagDataEntry, IEquatable<
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccChromaticityTagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccChromaticityTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs
index cfe24ae04b..f5d15897bf 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantOrderTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -39,13 +38,13 @@ internal sealed class IccColorantOrderTagDataEntry : IccTagDataEntry, IEquatable
     public byte[] ColorantNumber { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccColorantOrderTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccColorantOrderTagDataEntry other)
+    public bool Equals(IccColorantOrderTagDataEntry? other)
     {
         if (other is null)
         {
@@ -61,7 +60,7 @@ internal sealed class IccColorantOrderTagDataEntry : IccTagDataEntry, IEquatable
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccColorantOrderTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
index e5bd9dc019..92b353067e 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccColorantTableTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -40,10 +39,10 @@ internal sealed class IccColorantTableTagDataEntry : IccTagDataEntry, IEquatable
     public IccColorantTableEntry[] ColorantData { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other) => other is IccColorantTableTagDataEntry entry && this.Equals(entry);
+    public override bool Equals(IccTagDataEntry? other) => other is IccColorantTableTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccColorantTableTagDataEntry other)
+    public bool Equals(IccColorantTableTagDataEntry? other)
     {
         if (other is null)
         {
@@ -59,7 +58,7 @@ internal sealed class IccColorantTableTagDataEntry : IccTagDataEntry, IEquatable
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccColorantTableTagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccColorantTableTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode() => HashCode.Combine(this.Signature, this.ColorantData);
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs
index abf7e989c6..75176057d9 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -85,11 +84,11 @@ internal sealed class IccCrdInfoTagDataEntry : IccTagDataEntry, IEquatable<IccCr
     public string RenderingIntent3Crd { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccCrdInfoTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccCrdInfoTagDataEntry other)
+    public bool Equals(IccCrdInfoTagDataEntry? other)
     {
         if (other is null)
         {
@@ -110,7 +109,7 @@ internal sealed class IccCrdInfoTagDataEntry : IccTagDataEntry, IEquatable<IccCr
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccCrdInfoTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs
index 815fabddc8..5605d92559 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccCurveTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -87,13 +86,13 @@ internal sealed class IccCurveTagDataEntry : IccTagDataEntry, IEquatable<IccCurv
     public bool IsGamma => this.CurveData.Length == 1;
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccCurveTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccCurveTagDataEntry other)
+    public bool Equals(IccCurveTagDataEntry? other)
     {
         if (other is null)
         {
@@ -109,7 +108,7 @@ internal sealed class IccCurveTagDataEntry : IccTagDataEntry, IEquatable<IccCurv
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccCurveTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs
index 7502d4e192..3d83ccfee0 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Text;
 
@@ -58,14 +57,14 @@ internal sealed class IccDataTagDataEntry : IccTagDataEntry, IEquatable<IccDataT
     /// Gets the <see cref="Data"/> decoded as 7bit ASCII.
     /// If <see cref="IsAscii"/> is false, returns null
     /// </summary>
-    public string AsciiString => this.IsAscii ? Encoding.ASCII.GetString(this.Data, 0, this.Data.Length) : null;
+    public string? AsciiString => this.IsAscii ? Encoding.ASCII.GetString(this.Data, 0, this.Data.Length) : null;
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccDataTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccDataTagDataEntry other)
+    public bool Equals(IccDataTagDataEntry? other)
     {
         if (other is null)
         {
@@ -81,7 +80,7 @@ internal sealed class IccDataTagDataEntry : IccTagDataEntry, IEquatable<IccDataT
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccDataTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs
index fca82dfe21..cd3fdcd1b1 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccDateTimeTagDataEntry : IccTagDataEntry, IEquatable<IccD
     public DateTime Value { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccDateTimeTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccDateTimeTagDataEntry other)
+    public bool Equals(IccDateTimeTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccDateTimeTagDataEntry : IccTagDataEntry, IEquatable<IccD
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccDateTimeTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs
index 42e3c6f6d5..d72c382a7e 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccFix16ArrayTagDataEntry : IccTagDataEntry, IEquatable<Ic
     public float[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccFix16ArrayTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccFix16ArrayTagDataEntry other)
+    public bool Equals(IccFix16ArrayTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccFix16ArrayTagDataEntry : IccTagDataEntry, IEquatable<Ic
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccFix16ArrayTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
index 7bcd86e300..9ddd0ce13d 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 
@@ -110,10 +109,10 @@ internal sealed class IccLut16TagDataEntry : IccTagDataEntry, IEquatable<IccLut1
     public IccLut[] OutputValues { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other) => other is IccLut16TagDataEntry entry && this.Equals(entry);
+    public override bool Equals(IccTagDataEntry? other) => other is IccLut16TagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccLut16TagDataEntry other)
+    public bool Equals(IccLut16TagDataEntry? other)
     {
         if (other is null)
         {
@@ -133,7 +132,7 @@ internal sealed class IccLut16TagDataEntry : IccTagDataEntry, IEquatable<IccLut1
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccLut16TagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccLut16TagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
index 70af3cca17..0c07dc3b7a 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 
@@ -113,10 +112,10 @@ internal sealed class IccLut8TagDataEntry : IccTagDataEntry, IEquatable<IccLut8T
     public IccLut[] OutputValues { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other) => other is IccLut8TagDataEntry entry && this.Equals(entry);
+    public override bool Equals(IccTagDataEntry? other) => other is IccLut8TagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccLut8TagDataEntry other)
+    public bool Equals(IccLut8TagDataEntry? other)
     {
         if (other is null)
         {
@@ -136,7 +135,7 @@ internal sealed class IccLut8TagDataEntry : IccTagDataEntry, IEquatable<IccLut8T
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccLut8TagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccLut8TagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs
index cd67197939..5e20579a35 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 
@@ -71,13 +70,13 @@ internal sealed class IccMeasurementTagDataEntry : IccTagDataEntry, IEquatable<I
     public IccStandardIlluminant Illuminant { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccMeasurementTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccMeasurementTagDataEntry other)
+    public bool Equals(IccMeasurementTagDataEntry? other)
     {
         if (other is null)
         {
@@ -98,7 +97,7 @@ internal sealed class IccMeasurementTagDataEntry : IccTagDataEntry, IEquatable<I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccMeasurementTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
index 35b870dc30..eb2cfcf6c1 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -36,13 +35,13 @@ internal sealed class IccMultiLocalizedUnicodeTagDataEntry : IccTagDataEntry, IE
     public IccLocalizedString[] Texts { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccMultiLocalizedUnicodeTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccMultiLocalizedUnicodeTagDataEntry other)
+    public bool Equals(IccMultiLocalizedUnicodeTagDataEntry? other)
     {
         if (other is null)
         {
@@ -58,7 +57,7 @@ internal sealed class IccMultiLocalizedUnicodeTagDataEntry : IccTagDataEntry, IE
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccMultiLocalizedUnicodeTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
index 76b4752bce..1739eb66eb 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccMultiProcessElementsTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -54,11 +53,11 @@ internal sealed class IccMultiProcessElementsTagDataEntry : IccTagDataEntry, IEq
     public IccMultiProcessElement[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccMultiProcessElementsTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccMultiProcessElementsTagDataEntry other)
+    public bool Equals(IccMultiProcessElementsTagDataEntry? other)
     {
         if (other is null)
         {
@@ -77,7 +76,7 @@ internal sealed class IccMultiProcessElementsTagDataEntry : IccTagDataEntry, IEq
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccMultiProcessElementsTagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccMultiProcessElementsTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
index 70cf336d13..bf4e49ee0e 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccNamedColor2TagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -72,7 +71,7 @@ internal sealed class IccNamedColor2TagDataEntry : IccTagDataEntry, IEquatable<I
     /// <param name="suffix">Suffix</param>
     /// <param name="colors">The named colors</param>
     /// <param name="tagSignature">Tag Signature</param>
-    public IccNamedColor2TagDataEntry(int vendorFlags, string prefix, string suffix, IccNamedColor[] colors, IccProfileTag tagSignature)
+    public IccNamedColor2TagDataEntry(int vendorFlags, string? prefix, string? suffix, IccNamedColor[] colors, IccProfileTag tagSignature)
         : base(IccTypeSignature.NamedColor2, tagSignature)
     {
         Guard.NotNull(colors, nameof(colors));
@@ -100,12 +99,12 @@ internal sealed class IccNamedColor2TagDataEntry : IccTagDataEntry, IEquatable<I
     /// <summary>
     /// Gets the prefix
     /// </summary>
-    public string Prefix { get; }
+    public string? Prefix { get; }
 
     /// <summary>
     /// Gets the suffix
     /// </summary>
-    public string Suffix { get; }
+    public string? Suffix { get; }
 
     /// <summary>
     /// Gets the vendor specific flags
@@ -118,11 +117,11 @@ internal sealed class IccNamedColor2TagDataEntry : IccTagDataEntry, IEquatable<I
     public IccNamedColor[] Colors { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccNamedColor2TagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccNamedColor2TagDataEntry other)
+    public bool Equals(IccNamedColor2TagDataEntry? other)
     {
         if (other is null)
         {
@@ -143,7 +142,7 @@ internal sealed class IccNamedColor2TagDataEntry : IccTagDataEntry, IEquatable<I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccNamedColor2TagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs
index b9db9c256c..3a03ba8559 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccParametricCurveTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -36,13 +35,13 @@ internal sealed class IccParametricCurveTagDataEntry : IccTagDataEntry, IEquatab
     public IccParametricCurve Curve { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccParametricCurveTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccParametricCurveTagDataEntry other)
+    public bool Equals(IccParametricCurveTagDataEntry? other)
     {
         if (other is null)
         {
@@ -58,7 +57,7 @@ internal sealed class IccParametricCurveTagDataEntry : IccTagDataEntry, IEquatab
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccParametricCurveTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
index d3f89a9cce..92754088bd 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,11 +34,11 @@ internal sealed class IccProfileSequenceDescTagDataEntry : IccTagDataEntry, IEqu
     public IccProfileDescription[] Descriptions { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccProfileSequenceDescTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc />
-    public bool Equals(IccProfileSequenceDescTagDataEntry other)
+    public bool Equals(IccProfileSequenceDescTagDataEntry? other)
     {
         if (other is null)
         {
@@ -55,7 +54,7 @@ internal sealed class IccProfileSequenceDescTagDataEntry : IccTagDataEntry, IEqu
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccProfileSequenceDescTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc />
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs
index 9dbf16711b..ea1062d118 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccProfileSequenceIdentifierTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -36,13 +35,13 @@ internal sealed class IccProfileSequenceIdentifierTagDataEntry : IccTagDataEntry
     public IccProfileSequenceIdentifier[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccProfileSequenceIdentifierTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc />
-    public bool Equals(IccProfileSequenceIdentifierTagDataEntry other)
+    public bool Equals(IccProfileSequenceIdentifierTagDataEntry? other)
     {
         if (other is null)
         {
@@ -58,7 +57,7 @@ internal sealed class IccProfileSequenceIdentifierTagDataEntry : IccTagDataEntry
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccProfileSequenceIdentifierTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
index 5f6ff297ca..1c1680ded7 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -49,10 +48,10 @@ internal sealed class IccResponseCurveSet16TagDataEntry : IccTagDataEntry, IEqua
     public IccResponseCurve[] Curves { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other) => other is IccResponseCurveSet16TagDataEntry entry && this.Equals(entry);
+    public override bool Equals(IccTagDataEntry? other) => other is IccResponseCurveSet16TagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc />
-    public bool Equals(IccResponseCurveSet16TagDataEntry other)
+    public bool Equals(IccResponseCurveSet16TagDataEntry? other)
     {
         if (other is null)
         {
@@ -70,7 +69,7 @@ internal sealed class IccResponseCurveSet16TagDataEntry : IccTagDataEntry, IEqua
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => obj is IccResponseCurveSet16TagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccResponseCurveSet16TagDataEntry other && this.Equals(other);
 
     /// <inheritdoc />
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs
index 4b11828297..d014782455 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccScreeningTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -44,13 +43,13 @@ internal sealed class IccScreeningTagDataEntry : IccTagDataEntry, IEquatable<Icc
     public IccScreeningChannel[] Channels { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccScreeningTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc />
-    public bool Equals(IccScreeningTagDataEntry other)
+    public bool Equals(IccScreeningTagDataEntry? other)
     {
         if (other is null)
         {
@@ -68,7 +67,7 @@ internal sealed class IccScreeningTagDataEntry : IccTagDataEntry, IEquatable<Icc
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccScreeningTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs
index 23fdafa6a2..4d58a0978c 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccSignatureTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -34,11 +33,11 @@ internal sealed class IccSignatureTagDataEntry : IccTagDataEntry, IEquatable<Icc
     public string SignatureData { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccSignatureTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc />
-    public bool Equals(IccSignatureTagDataEntry other)
+    public bool Equals(IccSignatureTagDataEntry? other)
     {
         if (other is null)
         {
@@ -55,7 +54,7 @@ internal sealed class IccSignatureTagDataEntry : IccTagDataEntry, IEquatable<Icc
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccSignatureTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc />
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs
index 05a2c2aaf9..5fd32e3592 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccTextTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -33,11 +32,11 @@ internal sealed class IccTextTagDataEntry : IccTagDataEntry, IEquatable<IccTextT
     public string Text { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccTextTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc />
-    public bool Equals(IccTextTagDataEntry other)
+    public bool Equals(IccTextTagDataEntry? other)
     {
         if (other is null)
         {
@@ -53,7 +52,7 @@ internal sealed class IccTextTagDataEntry : IccTagDataEntry, IEquatable<IccTextT
     }
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccTextTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc />
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs
index 057b5cbb1e..8e63153e18 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccUFix16ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     public float[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccUFix16ArrayTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccUFix16ArrayTagDataEntry other)
+    public bool Equals(IccUFix16ArrayTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccUFix16ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccUFix16ArrayTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs
index 5130d06449..43d3be683e 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccUInt16ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     public ushort[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccUInt16ArrayTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccUInt16ArrayTagDataEntry other)
+    public bool Equals(IccUInt16ArrayTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccUInt16ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccUInt16ArrayTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs
index 7de731aea5..06ff8fd6c5 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccUInt32ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     public uint[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccUInt32ArrayTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccUInt32ArrayTagDataEntry other)
+    public bool Equals(IccUInt32ArrayTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccUInt32ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccUInt32ArrayTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
index cca385233e..4381bceaab 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -32,10 +31,10 @@ internal sealed class IccUInt64ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     public ulong[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other) => other is IccUInt64ArrayTagDataEntry entry && this.Equals(entry);
+    public override bool Equals(IccTagDataEntry? other) => other is IccUInt64ArrayTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccUInt64ArrayTagDataEntry other)
+    public bool Equals(IccUInt64ArrayTagDataEntry? other)
     {
         if (other is null)
         {
@@ -51,7 +50,7 @@ internal sealed class IccUInt64ArrayTagDataEntry : IccTagDataEntry, IEquatable<I
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccUInt64ArrayTagDataEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccUInt64ArrayTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode() => HashCode.Combine(this.Signature, this.Data);
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs
index edae1bd9ee..7a339ce824 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccUInt8ArrayTagDataEntry : IccTagDataEntry, IEquatable<Ic
     public byte[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccUInt8ArrayTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccUInt8ArrayTagDataEntry other)
+    public bool Equals(IccUInt8ArrayTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccUInt8ArrayTagDataEntry : IccTagDataEntry, IEquatable<Ic
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccUInt8ArrayTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs
index 16892b7bc2..dde42a8952 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUcrBgTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -52,11 +51,11 @@ internal sealed class IccUcrBgTagDataEntry : IccTagDataEntry, IEquatable<IccUcrB
     public string Description { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
         => other is IccUcrBgTagDataEntry entry && this.Equals(entry);
 
     /// <inheritdoc/>
-    public bool Equals(IccUcrBgTagDataEntry other)
+    public bool Equals(IccUcrBgTagDataEntry? other)
     {
         if (other is null)
         {
@@ -75,7 +74,7 @@ internal sealed class IccUcrBgTagDataEntry : IccTagDataEntry, IEquatable<IccUcrB
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccUcrBgTagDataEntry other && this.Equals(other);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs
index 23eb790e9e..fab61c7289 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -35,13 +34,13 @@ internal sealed class IccUnknownTagDataEntry : IccTagDataEntry, IEquatable<IccUn
     public byte[] Data { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccUnknownTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccUnknownTagDataEntry other)
+    public bool Equals(IccUnknownTagDataEntry? other)
     {
         if (other is null)
         {
@@ -57,7 +56,7 @@ internal sealed class IccUnknownTagDataEntry : IccTagDataEntry, IEquatable<IccUn
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccUnknownTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs
index 99e39161c6..113ae2577f 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 
@@ -53,13 +52,13 @@ internal sealed class IccViewingConditionsTagDataEntry : IccTagDataEntry, IEquat
     public IccStandardIlluminant Illuminant { get; }
 
     /// <inheritdoc/>
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         return other is IccViewingConditionsTagDataEntry entry && this.Equals(entry);
     }
 
     /// <inheritdoc/>
-    public bool Equals(IccViewingConditionsTagDataEntry other)
+    public bool Equals(IccViewingConditionsTagDataEntry? other)
     {
         if (other is null)
         {
@@ -78,7 +77,7 @@ internal sealed class IccViewingConditionsTagDataEntry : IccTagDataEntry, IEquat
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccViewingConditionsTagDataEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs
index a90066417b..c150034b40 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/TagDataEntries/IccXyzTagDataEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 
@@ -35,7 +34,7 @@ internal sealed class IccXyzTagDataEntry : IccTagDataEntry, IEquatable<IccXyzTag
     public Vector3[] Data { get; }
 
     /// <inheritdoc />
-    public override bool Equals(IccTagDataEntry other)
+    public override bool Equals(IccTagDataEntry? other)
     {
         if (base.Equals(other) && other is IccXyzTagDataEntry entry)
         {
@@ -46,11 +45,11 @@ internal sealed class IccXyzTagDataEntry : IccTagDataEntry, IEquatable<IccXyzTag
     }
 
     /// <inheritdoc />
-    public bool Equals(IccXyzTagDataEntry other)
-        => this.Equals((IccTagDataEntry)other);
+    public bool Equals(IccXyzTagDataEntry? other)
+        => this.Equals((IccTagDataEntry?)other);
 
     /// <inheritdoc />
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => this.Equals(obj as IccXyzTagDataEntry);
 
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccClut.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccClut.cs
index 726035cc85..26a882810e 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccClut.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccClut.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -112,7 +111,7 @@ internal sealed class IccClut : IEquatable<IccClut>
     public byte[] GridPointCount { get; }
 
     /// <inheritdoc/>
-    public bool Equals(IccClut other)
+    public bool Equals(IccClut? other)
     {
         if (other is null)
         {
@@ -132,7 +131,7 @@ internal sealed class IccClut : IEquatable<IccClut>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccClut other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccClut other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccColorantTableEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccColorantTableEntry.cs
index b30139c6bc..a47e19cb6b 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccColorantTableEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccColorantTableEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -84,7 +83,7 @@ internal readonly struct IccColorantTableEntry : IEquatable<IccColorantTableEntr
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccColorantTableEntry other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLocalizedString.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLocalizedString.cs
index cb2c162eb5..09294a2c6a 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLocalizedString.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLocalizedString.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Globalization;
 
@@ -51,7 +50,7 @@ internal readonly struct IccLocalizedString : IEquatable<IccLocalizedString>
     /// <inheritdoc />
     public override string ToString() => $"{this.Culture.Name}: {this.Text}";
 
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccLocalizedString iccLocalizedString && this.Equals(iccLocalizedString);
 
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLut.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLut.cs
index 8beed8a350..5f07e55890 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLut.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccLut.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -67,7 +66,7 @@ internal readonly struct IccLut : IEquatable<IccLut>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccLut iccLut && this.Equals(iccLut);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccNamedColor.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccNamedColor.cs
index aa3f5e815d..6e4e089c54 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccNamedColor.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccNamedColor.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -66,7 +65,7 @@ internal readonly struct IccNamedColor : IEquatable<IccNamedColor>
     public static bool operator !=(IccNamedColor left, IccNamedColor right) => !left.Equals(right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccNamedColor other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccNamedColor other && this.Equals(other);
 
     /// <inheritdoc/>
     public bool Equals(IccNamedColor other)
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccPositionNumber.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccPositionNumber.cs
index 03a01534a5..27b6f83ac1 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccPositionNumber.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccPositionNumber.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -61,7 +60,7 @@ internal readonly struct IccPositionNumber : IEquatable<IccPositionNumber>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccPositionNumber other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileDescription.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileDescription.cs
index 9091bd7b0c..f20b0fab55 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileDescription.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileDescription.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -74,7 +73,7 @@ internal readonly struct IccProfileDescription : IEquatable<IccProfileDescriptio
         && this.DeviceModelInfo.AsSpan().SequenceEqual(other.DeviceModelInfo);
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => obj is IccProfileDescription other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccProfileDescription other && this.Equals(other);
 
     /// <inheritdoc />
     public override int GetHashCode()
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileId.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileId.cs
index cc7a45652b..ce38d527d0 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileId.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileId.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Globalization;
 
@@ -81,7 +80,7 @@ public readonly struct IccProfileId : IEquatable<IccProfileId>
     public static bool operator !=(IccProfileId left, IccProfileId right) => !left.Equals(right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccProfileId other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccProfileId other && this.Equals(other);
 
     /// <inheritdoc/>
     public bool Equals(IccProfileId other) =>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
index aef9a65128..93db530ebc 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccProfileSequenceIdentifier.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -36,7 +35,7 @@ internal readonly struct IccProfileSequenceIdentifier : IEquatable<IccProfileSeq
         && this.Description.AsSpan().SequenceEqual(other.Description);
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => obj is IccProfileSequenceIdentifier other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccProfileSequenceIdentifier other && this.Equals(other);
 
     /// <inheritdoc />
     public override int GetHashCode() => HashCode.Combine(this.Id, this.Description);
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccResponseNumber.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccResponseNumber.cs
index c670768567..3d3f8862e9 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccResponseNumber.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccResponseNumber.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -61,7 +60,7 @@ internal readonly struct IccResponseNumber : IEquatable<IccResponseNumber>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccResponseNumber other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccScreeningChannel.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccScreeningChannel.cs
index 15bd522285..f6c39c28a9 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccScreeningChannel.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccScreeningChannel.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Runtime.InteropServices;
 
@@ -77,7 +76,7 @@ internal readonly struct IccScreeningChannel : IEquatable<IccScreeningChannel>
         this.SpotShape == other.SpotShape;
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is IccScreeningChannel other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccTagTableEntry.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccTagTableEntry.cs
index 2284b30112..e7d7461d5d 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccTagTableEntry.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccTagTableEntry.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -68,7 +67,7 @@ internal readonly struct IccTagTableEntry : IEquatable<IccTagTableEntry>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is IccTagTableEntry other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is IccTagTableEntry other && this.Equals(other);
 
     /// <inheritdoc/>
     public bool Equals(IccTagTableEntry other) =>
diff --git a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccVersion.cs b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccVersion.cs
index 7cbf10f971..63e8abeb5b 100644
--- a/src/ImageSharp/Metadata/Profiles/ICC/Various/IccVersion.cs
+++ b/src/ImageSharp/Metadata/Profiles/ICC/Various/IccVersion.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp.Metadata.Profiles.Icc;
 
@@ -56,7 +55,7 @@ public readonly struct IccVersion : IEquatable<IccVersion>
         => !(left == right);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is IccVersion iccVersion && this.Equals(iccVersion);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs
index bf00569e31..c282f03d89 100644
--- a/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs
+++ b/src/ImageSharp/PixelFormats/PixelImplementations/Bgra5551.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -141,7 +140,7 @@ public partial struct Bgra5551 : IPixel<Bgra5551>, IPackedVector<ushort>
     public void FromRgba64(Rgba64 source) => this.FromScaledVector4(source.ToScaledVector4());
 
     /// <inheritdoc />
-    public override bool Equals(object obj) => obj is Bgra5551 other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Bgra5551 other && this.Equals(other);
 
     /// <inheritdoc />
     [MethodImpl(InliningOptions.ShortMethod)]
diff --git a/src/ImageSharp/Primitives/ColorMatrix.cs b/src/ImageSharp/Primitives/ColorMatrix.cs
index 7aa9338dca..e06dc1f6a5 100644
--- a/src/ImageSharp/Primitives/ColorMatrix.cs
+++ b/src/ImageSharp/Primitives/ColorMatrix.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 #pragma warning disable SA1117 // Parameters should be on same line or separate lines
 using System.Globalization;
@@ -391,7 +390,7 @@ public struct ColorMatrix : IEquatable<ColorMatrix>
     public static bool operator !=(ColorMatrix value1, ColorMatrix value2) => !value1.Equals(value2);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is ColorMatrix matrix && this.Equals(matrix);
+    public override bool Equals(object? obj) => obj is ColorMatrix matrix && this.Equals(matrix);
 
     /// <inheritdoc/>
     public bool Equals(ColorMatrix other) =>
diff --git a/src/ImageSharp/Primitives/Complex64.cs b/src/ImageSharp/Primitives/Complex64.cs
index 4ed92acbf4..4baedd9bae 100644
--- a/src/ImageSharp/Primitives/Complex64.cs
+++ b/src/ImageSharp/Primitives/Complex64.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -78,7 +77,7 @@ internal readonly struct Complex64 : IEquatable<Complex64>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Complex64 other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Complex64 other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Primitives/ComplexVector4.cs b/src/ImageSharp/Primitives/ComplexVector4.cs
index 6e5da06adb..39bd2c2bab 100644
--- a/src/ImageSharp/Primitives/ComplexVector4.cs
+++ b/src/ImageSharp/Primitives/ComplexVector4.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Numerics;
 using System.Runtime.CompilerServices;
@@ -49,7 +48,7 @@ internal struct ComplexVector4 : IEquatable<ComplexVector4>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is ComplexVector4 other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is ComplexVector4 other && this.Equals(other);
 
     /// <inheritdoc/>
     public override int GetHashCode()
diff --git a/src/ImageSharp/Primitives/DenseMatrix{T}.cs b/src/ImageSharp/Primitives/DenseMatrix{T}.cs
index 31fb86be91..9849e0211f 100644
--- a/src/ImageSharp/Primitives/DenseMatrix{T}.cs
+++ b/src/ImageSharp/Primitives/DenseMatrix{T}.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
@@ -249,7 +248,7 @@ public readonly struct DenseMatrix<T> : IEquatable<DenseMatrix<T>>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is DenseMatrix<T> other && this.Equals(other);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Primitives/LongRational.cs b/src/ImageSharp/Primitives/LongRational.cs
index 429a72ddea..e92875a98b 100644
--- a/src/ImageSharp/Primitives/LongRational.cs
+++ b/src/ImageSharp/Primitives/LongRational.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Globalization;
 using System.Text;
@@ -67,7 +66,7 @@ internal readonly struct LongRational : IEquatable<LongRational>
     public bool IsZero => this.Denominator == 1 && this.Numerator == 0;
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
         => obj is LongRational longRational && this.Equals(longRational);
 
     /// <inheritdoc/>
diff --git a/src/ImageSharp/Primitives/Number.cs b/src/ImageSharp/Primitives/Number.cs
index fd47737643..fae67bbea1 100644
--- a/src/ImageSharp/Primitives/Number.cs
+++ b/src/ImageSharp/Primitives/Number.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Globalization;
 using System.Runtime.InteropServices;
@@ -146,7 +145,7 @@ public struct Number : IEquatable<Number>, IComparable<Number>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Number other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Number other && this.Equals(other);
 
     /// <inheritdoc/>
     public bool Equals(Number other)
diff --git a/src/ImageSharp/Primitives/Point.cs b/src/ImageSharp/Primitives/Point.cs
index f83124c06f..8ace7ffacf 100644
--- a/src/ImageSharp/Primitives/Point.cs
+++ b/src/ImageSharp/Primitives/Point.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.ComponentModel;
 using System.Numerics;
@@ -275,7 +274,7 @@ public struct Point : IEquatable<Point>
     public override string ToString() => $"Point [ X={this.X}, Y={this.Y} ]";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Point other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Point other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/ImageSharp/Primitives/PointF.cs b/src/ImageSharp/Primitives/PointF.cs
index a446b61df5..de363e2bd3 100644
--- a/src/ImageSharp/Primitives/PointF.cs
+++ b/src/ImageSharp/Primitives/PointF.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.ComponentModel;
 using System.Numerics;
@@ -284,7 +283,7 @@ public struct PointF : IEquatable<PointF>
     public override string ToString() => $"PointF [ X={this.X}, Y={this.Y} ]";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is PointF pointF && this.Equals(pointF);
+    public override bool Equals(object? obj) => obj is PointF pointF && this.Equals(pointF);
 
     /// <inheritdoc/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/ImageSharp/Primitives/Rational.cs b/src/ImageSharp/Primitives/Rational.cs
index 2352f29a05..59f34331a7 100644
--- a/src/ImageSharp/Primitives/Rational.cs
+++ b/src/ImageSharp/Primitives/Rational.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Globalization;
 
@@ -123,7 +122,7 @@ public readonly struct Rational : IEquatable<Rational>
     public static Rational FromDouble(double value, bool bestPrecision) => new Rational(value, bestPrecision);
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Rational other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Rational other && this.Equals(other);
 
     /// <inheritdoc/>
     public bool Equals(Rational other)
diff --git a/src/ImageSharp/Primitives/Rectangle.cs b/src/ImageSharp/Primitives/Rectangle.cs
index 70021d858e..baffbc7f49 100644
--- a/src/ImageSharp/Primitives/Rectangle.cs
+++ b/src/ImageSharp/Primitives/Rectangle.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.ComponentModel;
 using System.Numerics;
@@ -444,7 +443,7 @@ public struct Rectangle : IEquatable<Rectangle>
     public override string ToString() => $"Rectangle [ X={this.X}, Y={this.Y}, Width={this.Width}, Height={this.Height} ]";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Rectangle other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Rectangle other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/ImageSharp/Primitives/RectangleF.cs b/src/ImageSharp/Primitives/RectangleF.cs
index dc6bc9d68f..68add77d09 100644
--- a/src/ImageSharp/Primitives/RectangleF.cs
+++ b/src/ImageSharp/Primitives/RectangleF.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.ComponentModel;
 using System.Numerics;
@@ -379,7 +378,7 @@ public struct RectangleF : IEquatable<RectangleF>
         => $"RectangleF [ X={this.X}, Y={this.Y}, Width={this.Width}, Height={this.Height} ]";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is RectangleF other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is RectangleF other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/ImageSharp/Primitives/SignedRational.cs b/src/ImageSharp/Primitives/SignedRational.cs
index 9aec26ec50..d56ea825e6 100644
--- a/src/ImageSharp/Primitives/SignedRational.cs
+++ b/src/ImageSharp/Primitives/SignedRational.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.Globalization;
 
@@ -135,7 +134,7 @@ public readonly struct SignedRational : IEquatable<SignedRational>
     }
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is SignedRational other && this.Equals(other);
     }
diff --git a/src/ImageSharp/Primitives/Size.cs b/src/ImageSharp/Primitives/Size.cs
index 8191007ace..945b680daa 100644
--- a/src/ImageSharp/Primitives/Size.cs
+++ b/src/ImageSharp/Primitives/Size.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.ComponentModel;
 using System.Numerics;
@@ -269,7 +268,7 @@ public struct Size : IEquatable<Size>
     public override string ToString() => $"Size [ Width={this.Width}, Height={this.Height} ]";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is Size other && this.Equals(other);
+    public override bool Equals(object? obj) => obj is Size other && this.Equals(other);
 
     /// <inheritdoc/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/ImageSharp/Primitives/SizeF.cs b/src/ImageSharp/Primitives/SizeF.cs
index 849fcd7e64..36cf9eb8ef 100644
--- a/src/ImageSharp/Primitives/SizeF.cs
+++ b/src/ImageSharp/Primitives/SizeF.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 using System.ComponentModel;
 using System.Numerics;
@@ -215,7 +214,7 @@ public struct SizeF : IEquatable<SizeF>
     public override string ToString() => $"SizeF [ Width={this.Width}, Height={this.Height} ]";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj) => obj is SizeF && this.Equals((SizeF)obj);
+    public override bool Equals(object? obj) => obj is SizeF && this.Equals((SizeF)obj);
 
     /// <inheritdoc/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/ImageSharp/Primitives/ValueSize.cs b/src/ImageSharp/Primitives/ValueSize.cs
index 55fd65d5ab..f572dd658f 100644
--- a/src/ImageSharp/Primitives/ValueSize.cs
+++ b/src/ImageSharp/Primitives/ValueSize.cs
@@ -1,6 +1,5 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
-#nullable disable
 
 namespace SixLabors.ImageSharp;
 
@@ -115,7 +114,7 @@ internal readonly struct ValueSize : IEquatable<ValueSize>
     public override string ToString() => $"{this.Value} - {this.Type}";
 
     /// <inheritdoc/>
-    public override bool Equals(object obj)
+    public override bool Equals(object? obj)
     {
         return obj is ValueSize size && this.Equals(size);
     }