Use new HashHelper overloads

src/ImageSharp/ColorSpaces/CieLab.cs

@@ -120,10 +120,11 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.L.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.A.GetHashCode());
-            hash = HashHelpers.Combine(hash, this.B.GetHashCode());
-            return HashHelpers.Combine(hash, this.WhitePoint.GetHashCode());
+            return HashHelpers.Combine(
+                this.L.GetHashCode(),
+                this.A.GetHashCode(),
+                this.B.GetHashCode(),
+                this.WhitePoint.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/CieLch.cs

@@ -122,10 +122,11 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.L.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.C.GetHashCode());
-            hash = HashHelpers.Combine(hash, this.H.GetHashCode());
-            return HashHelpers.Combine(hash, this.WhitePoint.GetHashCode());
+            return HashHelpers.Combine(
+               this.L.GetHashCode(),
+               this.C.GetHashCode(),
+               this.H.GetHashCode(),
+               this.WhitePoint.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/CieLchuv.cs

@@ -121,10 +121,11 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.L.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.C.GetHashCode());
-            hash = HashHelpers.Combine(hash, this.H.GetHashCode());
-            return HashHelpers.Combine(hash, this.WhitePoint.GetHashCode());
+            return HashHelpers.Combine(
+                this.L.GetHashCode(),
+                this.C.GetHashCode(),
+                this.H.GetHashCode(),
+                this.WhitePoint.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/CieLuv.cs

@@ -121,10 +121,11 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.L.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.U.GetHashCode());
-            hash = HashHelpers.Combine(hash, this.V.GetHashCode());
-            return HashHelpers.Combine(hash, this.WhitePoint.GetHashCode());
+            return HashHelpers.Combine(
+                this.L.GetHashCode(),
+                this.U.GetHashCode(),
+                this.V.GetHashCode(),
+                this.WhitePoint.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/CieXyy.cs

@@ -85,9 +85,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.X.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.Y.GetHashCode());
-            return HashHelpers.Combine(hash, this.Yl.GetHashCode());
+            return HashHelpers.Combine(
+                this.X.GetHashCode(),
+                this.Y.GetHashCode(),
+                this.Yl.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/CieXyz.cs

@@ -88,9 +88,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.X.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.Y.GetHashCode());
-            return HashHelpers.Combine(hash, this.Z.GetHashCode());
+            return HashHelpers.Combine(
+                this.X.GetHashCode(),
+                this.Y.GetHashCode(),
+                this.Z.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/Cmyk.cs

@@ -92,10 +92,11 @@ namespace SixLabors.ImageSharp.ColorSpaces
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = this.C.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.M.GetHashCode());
-            hash = HashHelpers.Combine(hash, this.Y.GetHashCode());
-            return HashHelpers.Combine(hash, this.K.GetHashCode());
+            return HashHelpers.Combine(
+                this.C.GetHashCode(),
+                this.M.GetHashCode(),
+                this.Y.GetHashCode(),
+                this.K.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/Conversion/Implementation/RGBPrimariesChromaticityCoordinates.cs

@@ -88,12 +88,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.R.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.G.GetHashCode();
-                return (hashCode * 397) ^ this.B.GetHashCode();
-            }
+            return HashHelpers.Combine(this.R.GetHashCode(), this.G.GetHashCode(), this.B.GetHashCode());
         }
     }
 }

src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/GammaWorkingSpace.cs

@@ -57,10 +57,6 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         }
 
         /// <inheritdoc/>
-        public override int GetHashCode()
-        {
-            int hash = base.GetHashCode();
-            return HashHelpers.Combine(hash, this.Gamma.GetHashCode());
-        }
+        public override int GetHashCode() => HashHelpers.Combine(base.GetHashCode(), this.Gamma.GetHashCode());
     }
 }

src/ImageSharp/ColorSpaces/Conversion/Implementation/WorkingSpaces/RgbWorkingSpaceBase.cs

@@ -76,8 +76,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion.Implementation
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.WhitePoint.GetHashCode();
-            return HashHelpers.Combine(hash, this.ChromaticityCoordinates.GetHashCode());
+            return HashHelpers.Combine(this.WhitePoint.GetHashCode(), this.ChromaticityCoordinates.GetHashCode());
         }
     }
 }

src/ImageSharp/ColorSpaces/Hsl.cs

@@ -86,9 +86,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = this.H.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.S.GetHashCode());
-            return HashHelpers.Combine(hash, this.L.GetHashCode());
+            return HashHelpers.Combine(
+                this.H.GetHashCode(),
+                this.S.GetHashCode(),
+                this.L.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/Hsv.cs

@@ -84,9 +84,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = this.H.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.S.GetHashCode());
-            return HashHelpers.Combine(hash, this.V.GetHashCode());
+            return HashHelpers.Combine(
+                this.H.GetHashCode(),
+                this.S.GetHashCode(),
+                this.V.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/HunterLab.cs

@@ -119,10 +119,11 @@ namespace SixLabors.ImageSharp.ColorSpaces
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = this.L.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.A.GetHashCode());
-            hash = HashHelpers.Combine(hash, this.B.GetHashCode());
-            return HashHelpers.Combine(hash, this.WhitePoint.GetHashCode());
+            return HashHelpers.Combine(
+                this.L.GetHashCode(),
+                this.A.GetHashCode(),
+                this.B.GetHashCode(),
+                this.WhitePoint.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/LinearRgb.cs

@@ -128,9 +128,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = this.R.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.G.GetHashCode());
-            return HashHelpers.Combine(hash, this.B.GetHashCode());
+            return HashHelpers.Combine(
+                this.R.GetHashCode(),
+                this.G.GetHashCode(),
+                this.B.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/Lms.cs

@@ -89,9 +89,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.L.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.M.GetHashCode());
-            return HashHelpers.Combine(hash, this.S.GetHashCode());
+            return HashHelpers.Combine(
+                this.L.GetHashCode(),
+                this.M.GetHashCode(),
+                this.S.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/Rgb.cs

@@ -149,9 +149,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            int hash = this.R.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.G.GetHashCode());
-            return HashHelpers.Combine(hash, this.B.GetHashCode());
+            return HashHelpers.Combine(
+                this.R.GetHashCode(),
+                this.G.GetHashCode(),
+                this.B.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/ColorSpaces/YCbCr.cs

@@ -85,9 +85,10 @@ namespace SixLabors.ImageSharp.ColorSpaces
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = this.Y.GetHashCode();
-            hash = HashHelpers.Combine(hash, this.Cb.GetHashCode());
-            return HashHelpers.Combine(hash, this.Cr.GetHashCode());
+            return HashHelpers.Combine(
+                this.Y.GetHashCode(),
+                this.Cb.GetHashCode(),
+                this.Cr.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/Formats/Jpeg/Components/Decoder/AdobeMarker.cs

@@ -102,11 +102,9 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder
         {
             return HashHelpers.Combine(
                 this.DCTEncodeVersion.GetHashCode(),
-                HashHelpers.Combine(
-                    this.APP14Flags0.GetHashCode(),
-                    HashHelpers.Combine(
-                        this.APP14Flags1.GetHashCode(),
-                        this.ColorTransform.GetHashCode())));
+                this.APP14Flags0.GetHashCode(),
+                this.APP14Flags1.GetHashCode(),
+                this.ColorTransform.GetHashCode());
         }
     }
 }

src/ImageSharp/MetaData/Profiles/ICC/Curves/IccResponseCurve.cs

@@ -73,13 +73,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = (int)this.CurveType;
-                hashCode = (hashCode * 397) ^ (this.XyzValues?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.ResponseArrays?.GetHashCode() ?? 0);
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                (int)this.CurveType,
+                this.XyzValues.GetHashCode(),
+                this.ResponseArrays.GetHashCode());
         }
 
         private bool EqualsResponseArray(IccResponseCurve other)

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

@@ -110,13 +110,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ (int)this.ColorantType;
-                hashCode = (hashCode * 397) ^ (this.ChannelValues?.GetHashCode() ?? 0);
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                (int)this.ColorantType,
+                this.ChannelValues.GetHashCode());
         }
 
         private static double[][] GetColorantArray(IccColorantEncoding colorantType)

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

@@ -70,10 +70,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.ColorantNumber?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.ColorantNumber.GetHashCode());
         }
     }
 }

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

@@ -72,10 +72,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.ColorantData?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.ColorantData.GetHashCode());
         }
     }
 }

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

@@ -118,10 +118,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.CurveData?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.CurveData.GetHashCode());
         }
     }
 }

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

@@ -91,13 +91,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ (this.Data?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ this.IsAscii.GetHashCode();
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                this.Data.GetHashCode(),
+                this.IsAscii.GetHashCode());
         }
     }
 }

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

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ this.Value.GetHashCode();
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Value.GetHashCode());
         }
     }
 }

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

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

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

@@ -62,17 +62,14 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             : base(IccTypeSignature.Lut16, tagSignature)
         {
             Guard.NotNull(matrix, nameof(matrix));
-            Guard.NotNull(inputValues, nameof(inputValues));
-            Guard.NotNull(clutValues, nameof(clutValues));
-            Guard.NotNull(outputValues, nameof(outputValues));
 
             bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
             Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
 
             this.Matrix = this.CreateMatrix(matrix);
-            this.InputValues = inputValues;
-            this.ClutValues = clutValues;
-            this.OutputValues = outputValues;
+            this.InputValues = inputValues ?? throw new ArgumentNullException(nameof(inputValues));
+            this.ClutValues = clutValues ?? throw new ArgumentNullException(nameof(clutValues));
+            this.OutputValues = outputValues ?? throw new ArgumentNullException(nameof(outputValues));
 
             Guard.IsTrue(this.InputChannelCount == clutValues.InputChannelCount, nameof(clutValues), "Input channel count does not match the CLUT size");
             Guard.IsTrue(this.OutputChannelCount == clutValues.OutputChannelCount, nameof(clutValues), "Output channel count does not match the CLUT size");
@@ -147,9 +144,9 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             {
                 int hashCode = base.GetHashCode();
                 hashCode = (hashCode * 397) ^ this.Matrix.GetHashCode();
-                hashCode = (hashCode * 397) ^ (this.InputValues?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.ClutValues?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.OutputValues?.GetHashCode() ?? 0);
+                hashCode = (hashCode * 397) ^ this.InputValues.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.ClutValues.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.OutputValues.GetHashCode();
                 return hashCode;
             }
         }

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

@@ -62,17 +62,14 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             : base(IccTypeSignature.Lut8, tagSignature)
         {
             Guard.NotNull(matrix, nameof(matrix));
-            Guard.NotNull(inputValues, nameof(inputValues));
-            Guard.NotNull(clutValues, nameof(clutValues));
-            Guard.NotNull(outputValues, nameof(outputValues));
 
             bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
             Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
 
             this.Matrix = this.CreateMatrix(matrix);
-            this.InputValues = inputValues;
-            this.ClutValues = clutValues;
-            this.OutputValues = outputValues;
+            this.InputValues = inputValues ?? throw new ArgumentNullException(nameof(inputValues));
+            this.ClutValues = clutValues ?? throw new ArgumentNullException(nameof(clutValues));
+            this.OutputValues = outputValues ?? throw new ArgumentNullException(nameof(outputValues));
 
             Guard.IsTrue(this.InputChannelCount == clutValues.InputChannelCount, nameof(clutValues), "Input channel count does not match the CLUT size");
             Guard.IsTrue(this.OutputChannelCount == clutValues.OutputChannelCount, nameof(clutValues), "Output channel count does not match the CLUT size");
@@ -150,9 +147,9 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             {
                 int hashCode = base.GetHashCode();
                 hashCode = (hashCode * 397) ^ this.Matrix.GetHashCode();
-                hashCode = (hashCode * 397) ^ (this.InputValues?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.ClutValues?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.OutputValues?.GetHashCode() ?? 0);
+                hashCode = (hashCode * 397) ^ this.InputValues.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.ClutValues.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.OutputValues.GetHashCode();
                 return hashCode;
             }
         }

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

@@ -68,10 +68,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Texts?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Texts.GetHashCode());
         }
     }
 }

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

@@ -90,14 +90,11 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.InputChannelCount;
-                hashCode = (hashCode * 397) ^ this.OutputChannelCount;
-                hashCode = (hashCode * 397) ^ (this.Data?.GetHashCode() ?? 0);
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                this.InputChannelCount,
+                this.OutputChannelCount,
+                this.Data.GetHashCode());
         }
     }
 }

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

@@ -28,7 +28,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         public IccParametricCurveTagDataEntry(IccParametricCurve curve, IccProfileTag tagSignature)
             : base(IccTypeSignature.ParametricCurve, tagSignature)
         {
-            this.Curve = curve;
+            this.Curve = curve ?? throw new ArgumentNullException(nameof(curve));
         }
 
         /// <summary>
@@ -67,10 +67,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Curve?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Curve.GetHashCode());
         }
     }
 }

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

@@ -69,10 +69,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Descriptions?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Descriptions.GetHashCode());
         }
     }
 }

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

@@ -67,10 +67,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccResponseCurveSet16TagDataEntry.cs

@@ -83,13 +83,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.ChannelCount.GetHashCode();
-                hashCode = (hashCode * 397) ^ (this.Curves?.GetHashCode() ?? 0);
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                this.ChannelCount.GetHashCode(),
+                this.Curves.GetHashCode());
         }
     }
 }

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

@@ -77,13 +77,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ (int)this.Flags;
-                hashCode = (hashCode * 397) ^ (this.Channels?.GetHashCode() ?? 0);
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                (int)this.Flags,
+                this.Channels.GetHashCode());
         }
     }
 }

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

@@ -67,10 +67,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.SignatureData?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.SignatureData.GetHashCode());
         }
     }
 }

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

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Text?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Text.GetHashCode());
         }
     }
 }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUFix16ArrayTagDataEntry.cs

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccUInt16ArrayTagDataEntry.cs

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

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

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

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

@@ -67,10 +67,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

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

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

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

@@ -86,14 +86,11 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ (this.UcrCurve?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.BgCurve?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.Description?.GetHashCode() ?? 0);
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                this.UcrCurve.GetHashCode(),
+                this.BgCurve.GetHashCode(),
+                this.Description.GetHashCode());
         }
     }
 }

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

@@ -66,10 +66,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (base.GetHashCode() * 397) ^ (this.Data?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(base.GetHashCode(), this.Data.GetHashCode());
         }
     }
 }

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

@@ -86,14 +86,11 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = base.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.IlluminantXyz.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.SurroundXyz.GetHashCode();
-                hashCode = (hashCode * 397) ^ (int)this.Illuminant;
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                base.GetHashCode(),
+                this.IlluminantXyz.GetHashCode(),
+                this.SurroundXyz.GetHashCode(),
+                (int)this.Illuminant);
         }
     }
 }

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

@@ -144,11 +144,11 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         {
             unchecked
             {
-                int hashCode = this.Values?.GetHashCode() ?? 0;
+                int hashCode = this.Values.GetHashCode();
                 hashCode = (hashCode * 397) ^ (int)this.DataType;
                 hashCode = (hashCode * 397) ^ this.InputChannelCount;
                 hashCode = (hashCode * 397) ^ this.OutputChannelCount;
-                hashCode = (hashCode * 397) ^ (this.GridPointCount?.GetHashCode() ?? 0);
+                hashCode = (hashCode * 397) ^ this.GridPointCount.GetHashCode();
                 return hashCode;
             }
         }

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

@@ -102,14 +102,11 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.Name.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Pcs1.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Pcs2.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Pcs3.GetHashCode();
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                this.Name.GetHashCode(),
+                this.Pcs1.GetHashCode(),
+                this.Pcs2.GetHashCode(),
+                this.Pcs3.GetHashCode());
         }
 
         /// <inheritdoc/>

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

@@ -80,27 +80,23 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <inheritdoc/>
-        public bool Equals(IccNamedColor other) =>
-            this.Name == other.Name &&
-            this.PcsCoordinates.SequenceEqual(other.PcsCoordinates) &&
-            this.DeviceCoordinates.SequenceEqual(other.DeviceCoordinates);
+        public bool Equals(IccNamedColor other)
+        {
+            return this.Name.Equals(other.Name)
+                && this.PcsCoordinates.SequenceEqual(other.PcsCoordinates)
+                && this.DeviceCoordinates.SequenceEqual(other.DeviceCoordinates);
+        }
 
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.Name.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.PcsCoordinates.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.DeviceCoordinates.GetHashCode();
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                this.Name.GetHashCode(),
+                this.PcsCoordinates.GetHashCode(),
+                this.DeviceCoordinates.GetHashCode());
         }
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return this.Name;
-        }
+        public override string ToString() => this.Name;
     }
 }

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

@@ -73,15 +73,9 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             this.Size == other.Size;
 
         /// <inheritdoc/>
-        public override int GetHashCode()
-        {
-            return unchecked((int)(this.Offset ^ this.Size));
-        }
+        public override int GetHashCode() => unchecked((int)(this.Offset ^ this.Size));
 
         /// <inheritdoc/>
-        public override string ToString()
-        {
-            return $"{this.Offset}; {this.Size}";
-        }
+        public override string ToString() => $"{this.Offset}; {this.Size}";
     }
 }

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

@@ -28,15 +28,12 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
             IccLocalizedString[] deviceManufacturerInfo,
             IccLocalizedString[] deviceModelInfo)
         {
-            Guard.NotNull(deviceManufacturerInfo, nameof(deviceManufacturerInfo));
-            Guard.NotNull(deviceModelInfo, nameof(deviceModelInfo));
-
             this.DeviceManufacturer = deviceManufacturer;
             this.DeviceModel = deviceModel;
             this.DeviceAttributes = deviceAttributes;
             this.TechnologyInformation = technologyInformation;
-            this.DeviceManufacturerInfo = deviceManufacturerInfo;
-            this.DeviceModelInfo = deviceModelInfo;
+            this.DeviceManufacturerInfo = deviceManufacturerInfo ?? throw new ArgumentNullException(nameof(deviceManufacturerInfo));
+            this.DeviceModelInfo = deviceModelInfo ?? throw new ArgumentNullException(nameof(deviceModelInfo));
         }
 
         /// <summary>
@@ -93,8 +90,8 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
                 hashCode = (hashCode * 397) ^ (int)this.DeviceModel;
                 hashCode = (hashCode * 397) ^ this.DeviceAttributes.GetHashCode();
                 hashCode = (hashCode * 397) ^ (int)this.TechnologyInformation;
-                hashCode = (hashCode * 397) ^ (this.DeviceManufacturerInfo?.GetHashCode() ?? 0);
-                hashCode = (hashCode * 397) ^ (this.DeviceModelInfo?.GetHashCode() ?? 0);
+                hashCode = (hashCode * 397) ^ this.DeviceManufacturerInfo.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.DeviceModelInfo.GetHashCode();
                 return hashCode;
             }
         }

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

@@ -101,14 +101,11 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.Part1.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Part2.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Part3.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Part4.GetHashCode();
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                this.Part1.GetHashCode(),
+                this.Part2.GetHashCode(),
+                this.Part3.GetHashCode(),
+                this.Part4.GetHashCode());
         }
 
         /// <inheritdoc/>

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

@@ -18,10 +18,8 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <param name="description">Description of the profile</param>
         public IccProfileSequenceIdentifier(IccProfileId id, IccLocalizedString[] description)
         {
-            Guard.NotNull(description, nameof(description));
-
             this.Id = id;
-            this.Description = description;
+            this.Description = description ?? throw new ArgumentNullException(nameof(description));
         }
 
         /// <summary>
@@ -48,10 +46,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            unchecked
-            {
-                return (this.Id.GetHashCode() * 397) ^ (this.Description?.GetHashCode() ?? 0);
-            }
+            return HashHelpers.Combine(this.Id.GetHashCode(), this.Description.GetHashCode());
         }
     }
 }

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

@@ -75,12 +75,9 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.DeviceCode.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.MeasurementValue.GetHashCode();
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                this.DeviceCode.GetHashCode(),
+                this.MeasurementValue.GetHashCode());
         }
 
         /// <inheritdoc/>

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

@@ -85,13 +85,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.Frequency.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Angle.GetHashCode();
-                hashCode = (hashCode * 397) ^ (int)this.SpotShape;
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                this.Frequency.GetHashCode(),
+                this.Angle.GetHashCode(),
+                (int)this.SpotShape);
         }
 
         /// <inheritdoc/>

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

@@ -83,13 +83,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            unchecked
-            {
-                int hashCode = this.Signature.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.Offset.GetHashCode();
-                hashCode = (hashCode * 397) ^ this.DataSize.GetHashCode();
-                return hashCode;
-            }
+            return HashHelpers.Combine(
+                this.Signature.GetHashCode(),
+                this.Offset.GetHashCode(),
+                this.DataSize.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/PixelFormats/PixelImplementations/Bgr24.cs

@@ -191,8 +191,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = HashHelpers.Combine(this.R.GetHashCode(), this.G.GetHashCode());
-            return HashHelpers.Combine(hash, this.B.GetHashCode());
+            return HashHelpers.Combine(this.R.GetHashCode(), this.B.GetHashCode(), this.G.GetHashCode());
         }
     }
 }

src/ImageSharp/PixelFormats/PixelImplementations/Rgb24.cs

@@ -202,8 +202,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            int hash = HashHelpers.Combine(this.R.GetHashCode(), this.G.GetHashCode());
-            return HashHelpers.Combine(hash, this.B.GetHashCode());
+            return HashHelpers.Combine(this.R.GetHashCode(), this.B.GetHashCode(), this.G.GetHashCode());
         }
 
         /// <inheritdoc/>

src/ImageSharp/PixelFormats/PixelImplementations/Rgb48.cs

@@ -191,9 +191,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         [MethodImpl(InliningOptions.ShortMethod)]
         public override int GetHashCode()
         {
-            return HashHelpers.Combine(
-                this.R.GetHashCode(),
-                HashHelpers.Combine(this.G.GetHashCode(), this.B.GetHashCode()));
+            return HashHelpers.Combine(this.R.GetHashCode(), this.G.GetHashCode(), this.B.GetHashCode());
         }
     }
 }