perf: Update DependencyPropertyCacheEntry comparer

src/Uno.UI/UI/Xaml/DependencyPropertyCacheEntry.cs

@@ -1,5 +1,7 @@
-using System;
-using System.Collections.Generic;
+#nullable enable
+
+using System;
+using System.Collections;
 using System.Text;
 using Uno.Core.Comparison;
 
@@ -23,23 +25,28 @@ public PropertyCacheEntry(Type type, string name)
 
 		public static readonly Comparer DefaultComparer = new Comparer();
 
-		internal class Comparer : IEqualityComparer<PropertyCacheEntry>
+		internal class Comparer : IEqualityComparer
 		{
-			bool IEqualityComparer<PropertyCacheEntry>.Equals(PropertyCacheEntry left, PropertyCacheEntry right)
+			bool IEqualityComparer.Equals(object? x, object? y)
 			{
-				// This method assumes that there will never be null parameters, and that the Type and Name fields 
-				// are never null.
-				return left.Type == right.Type
-				&& (
-						object.ReferenceEquals(left.Name, right.Name)
-						|| string.CompareOrdinal(left.Name, right.Name) == 0
-					);
+				if(x is PropertyCacheEntry left && y is PropertyCacheEntry right)
+				{
+					// This method assumes that there will never be null parameters, and that the Type and Name fields 
+					// are never null.
+					return left.Type == right.Type
+					&& (
+							object.ReferenceEquals(left.Name, right.Name)
+							|| string.CompareOrdinal(left.Name, right.Name) == 0
+						);
+				}
+				else
+				{
+					return false;
+				}
 			}
 
-			int IEqualityComparer<PropertyCacheEntry>.GetHashCode(PropertyCacheEntry obj)
-			{
-				return obj.CachedHashCode;
-			}
+			int IEqualityComparer.GetHashCode(object? obj)
+				=> obj is PropertyCacheEntry entry ? entry.CachedHashCode : 0;
 		}
 	}