Add a more '.net' looking auto genereted comment

Author: dellis1972

src/Xamarin.Android.Build.Tasks/Tasks/GenerateResourceDesignerIntermediateClass.cs

@@ -15,15 +15,23 @@ public class GenerateResourceDesignerIntermediateClass : AndroidTask
 		private const string ResourceDesigner = $"{FixLegacyResourceDesignerStep.DesignerAssemblyNamespace}.Resource";
 		private const string ResourceDesignerConstants = $"{FixLegacyResourceDesignerStep.DesignerAssemblyNamespace}.ResourceConstant";
 
-		private const string CSharpTemplate = @"// This is an Auto Generated file DO NOT EDIT
+		private const string CSharpTemplate = @"//------------------------------------------------------------------------------
+// <auto-generated>
+//	This code was generated by a tool. DO NOT EDIT
+// </auto-generated>
+//------------------------------------------------------------------------------
 using System;
 
 namespace %NAMESPACE% {
 	public partial class Resource : %BASECLASS% {
 	}
 }
 ";
-		private const string FSharpTemplate = @"// This is an Auto Generated file DO NOT EDIT
+		private const string FSharpTemplate = @"//------------------------------------------------------------------------------
+// <auto-generated>
+//	This code was generated by a tool. DO NOT EDIT
+// </auto-generated>
+//------------------------------------------------------------------------------
 namespace %NAMESPACE%
 
 type Resource = %BASECLASS%