Use pattern matching

src/ImageSharp/MetaData/Profiles/ICC/IccReader.cs

@@ -84,7 +84,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         private IccTagDataEntry[] ReadTagData(IccDataReader reader)
         {
             IccTagTableEntry[] tagTable = this.ReadTagTable(reader);
-            IccTagDataEntry[] entries = new IccTagDataEntry[tagTable.Length];
+            var entries = new IccTagDataEntry[tagTable.Length];
             var store = new Dictionary<uint, IccTagDataEntry>();
             for (int i = 0; i < tagTable.Length; i++)
             {
@@ -112,7 +112,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             reader.SetIndex(128);   // An ICC header is 128 bytes long
 
             uint tagCount = reader.ReadUInt32();
-            IccTagTableEntry[] table = new IccTagTableEntry[tagCount];
+            var table = new IccTagTableEntry[tagCount];
 
             for (int i = 0; i < tagCount; i++)
             {

src/ImageSharp/MetaData/Profiles/ICC/IccTagDataEntry.cs

@@ -44,7 +44,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }
@@ -54,8 +54,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
                 return true;
             }
 
-            var entry = obj as IccTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return obj is IccTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
@@ -70,7 +69,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public virtual bool Equals(IccTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccChromaticityTagDataEntry.cs

@@ -82,8 +82,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccChromaticityTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccChromaticityTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccCrdInfoTagDataEntry.cs

@@ -88,14 +88,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccCrdInfoTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccCrdInfoTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccCrdInfoTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDataTagDataEntry.cs

@@ -67,8 +67,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccDataTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccDataTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccDateTimeTagDataEntry.cs

@@ -38,8 +38,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccDateTimeTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccDateTimeTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccFix16ArrayTagDataEntry.cs

@@ -40,14 +40,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccFix16ArrayTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccFix16ArrayTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccFix16ArrayTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
@@ -63,7 +62,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs

@@ -111,14 +111,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccLut16TagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccLut16TagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccLut16TagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
@@ -138,7 +137,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs

@@ -114,14 +114,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccLut8TagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccLut8TagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccLut8TagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
@@ -141,7 +140,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutAToBTagDataEntry.cs

@@ -147,14 +147,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccLutAToBTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccLutAToBTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccLutAToBTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLutBToATagDataEntry.cs

@@ -147,14 +147,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccLutBToATagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccLutBToATagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccLutBToATagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
@@ -178,7 +177,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }
@@ -188,7 +187,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
                 return true;
             }
 
-            return obj is IccLutBToATagDataEntry && this.Equals((IccLutBToATagDataEntry)obj);
+            return obj is IccLutBToATagDataEntry other && this.Equals(other);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMeasurementTagDataEntry.cs

@@ -73,18 +73,17 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccMeasurementTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccMeasurementTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccMeasurementTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
-
+            
             if (ReferenceEquals(this, other))
             {
                 return true;

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccMultiLocalizedUnicodeTagDataEntry.cs

@@ -41,14 +41,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccMultiLocalizedUnicodeTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccMultiLocalizedUnicodeTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccMultiLocalizedUnicodeTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccProfileSequenceDescTagDataEntry.cs

@@ -42,8 +42,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccProfileSequenceDescTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccProfileSequenceDescTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc />
@@ -65,7 +64,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }
@@ -75,7 +74,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
                 return true;
             }
 
-            return obj is IccProfileSequenceDescTagDataEntry && this.Equals((IccProfileSequenceDescTagDataEntry)obj);
+            return obj is IccProfileSequenceDescTagDataEntry other && this.Equals(other);
         }
 
         /// <inheritdoc />

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccTextDescriptionTagDataEntry.cs

@@ -133,8 +133,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccTextDescriptionTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccTextDescriptionTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc />
@@ -161,7 +160,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt32ArrayTagDataEntry.cs

@@ -40,14 +40,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccUInt32ArrayTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccUInt32ArrayTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccUInt32ArrayTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt64ArrayTagDataEntry.cs

@@ -40,14 +40,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccUInt64ArrayTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccUInt64ArrayTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccUInt64ArrayTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt8ArrayTagDataEntry.cs

@@ -40,14 +40,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccUInt8ArrayTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccUInt8ArrayTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccUInt8ArrayTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
@@ -73,7 +72,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
                 return true;
             }
 
-            return obj is IccUInt8ArrayTagDataEntry && this.Equals((IccUInt8ArrayTagDataEntry)obj);
+            return obj is IccUInt8ArrayTagDataEntry other && this.Equals(other);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUnknownTagDataEntry.cs

@@ -40,14 +40,13 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccUnknownTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccUnknownTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>
         public bool Equals(IccUnknownTagDataEntry other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }
@@ -63,7 +62,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj))
+            if (obj == null)
             {
                 return false;
             }
@@ -73,7 +72,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
                 return true;
             }
 
-            return obj is IccUnknownTagDataEntry && this.Equals((IccUnknownTagDataEntry)obj);
+            return obj is IccUnknownTagDataEntry other && this.Equals(other);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccViewingConditionsTagDataEntry.cs

@@ -55,8 +55,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override bool Equals(IccTagDataEntry other)
         {
-            var entry = other as IccViewingConditionsTagDataEntry;
-            return entry != null && this.Equals(entry);
+            return other is IccViewingConditionsTagDataEntry entry && this.Equals(entry);
         }
 
         /// <inheritdoc/>

src/ImageSharp/MetaData/Profiles/ICC/Various/IccProfileDescription.cs

@@ -72,7 +72,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public bool Equals(IccProfileDescription other)
         {
-            if (ReferenceEquals(null, other))
+            if (other == null)
             {
                 return false;
             }