Add equality methods to MethodImplementation.

src/AsmResolver.DotNet/MethodImplementation.cs

@@ -1,9 +1,11 @@
+using System;
+
 namespace AsmResolver.DotNet
 {
     /// <summary>
     /// Defines an explicit implementation of a method defined by an interface.
     /// </summary>
-    public readonly struct MethodImplementation
+    public readonly struct MethodImplementation : IEquatable<MethodImplementation>
     {
         /// <summary>
         /// Creates a new explicit implementation of a method.
@@ -33,7 +35,31 @@ public MethodImplementation(IMethodDefOrRef? declaration, IMethodDefOrRef? body)
         }
 
         /// <inheritdoc />
-        public override string ToString() =>
-            $".override {Declaration} with {Body}";
+        public override string ToString() => $".override {Declaration} with {Body}";
+
+        /// <summary>
+        /// Determines whether two method implementations record are equal.
+        /// </summary>
+        /// <param name="other">The other implementation record.</param>
+        /// <returns><c>true</c> if they are considered equal, <c>false</c> otherwise.</returns>
+        public bool Equals(MethodImplementation other)
+        {
+            return Equals(Declaration, other.Declaration) && Equals(Body, other.Body);
+        }
+
+        /// <inheritdoc />
+        public override bool Equals(object? obj)
+        {
+            return obj is MethodImplementation other && Equals(other);
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                return ((Declaration != null ? Declaration.GetHashCode() : 0) * 397) ^ (Body != null ? Body.GetHashCode() : 0);
+            }
+        }
     }
 }