Imported Upstream version 5.20.0.180

Former-commit-id: ff953ca879339fe1e1211f7220f563e1342e66cb

mcs/class/corlib/coreclr/MemberInfo.cs

@@ -0,0 +1,26 @@
+namespace System.Reflection {
+	partial class MemberInfo {
+		internal virtual bool CacheEquals (object o) 
+		{ 
+			throw new NotImplementedException (); 
+		}
+
+		internal bool HasSameMetadataDefinitionAsCore<TOther> (MemberInfo other) where TOther : MemberInfo
+		{
+			if (other == null)
+				throw new ArgumentNullException (nameof (other));
+
+			// Ensure that "other" is a runtime-implemented MemberInfo. Do this check before calling any methods on it!
+			if (!(other is TOther)) 
+				return false;
+
+			if (MetadataToken != other.MetadataToken)
+				return false;
+
+			if (!(Module.Equals (other.Module)))
+				return false;
+
+			return true;
+		}
+	}
+}