Use pattern matching

src/ImageSharp/PixelFormats/Rgba1010102.cs

@@ -188,7 +188,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <inheritdoc />
         public override bool Equals(object obj)
         {
-            return (obj is Rgba1010102) && this.Equals((Rgba1010102)obj);
+            return obj is Rgba1010102 other && this.Equals(other);
         }
 
         /// <inheritdoc />

src/ImageSharp/PixelFormats/Rgba32.cs

@@ -387,7 +387,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <inheritdoc/>
         public override bool Equals(object obj)
         {
-            return (obj is Rgba32) && this.Equals((Rgba32)obj);
+            return obj is Rgba32 other && this.Equals(other);
         }
 
         /// <inheritdoc/>

src/ImageSharp/PixelFormats/Rgba64.cs

@@ -187,7 +187,7 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <inheritdoc />
         public override bool Equals(object obj)
         {
-            return (obj is Rgba64) && this.Equals((Rgba64)obj);
+            return obj is Rgba64 other && this.Equals(other);
         }
 
         /// <inheritdoc />