Do a better job at detecting closure classes

ICSharpCode.Decompiler/Ast/AstBuilder.cs

@@ -77,7 +77,7 @@ namespace ICSharpCode.Decompiler.Ast
 			TypeDefinition type = member as TypeDefinition;
 			if (type != null) {
 				if (type.DeclaringType != null) {
-					if (settings.AnonymousMethods && type.HasGeneratedName() && type.IsCompilerGenerated())
+					if (settings.AnonymousMethods && IsClosureType(type))
 						return true;
 					if (settings.YieldReturn && YieldReturnDecompiler.IsCompilerGeneratorEnumerator(type))
 						return true;
@@ -105,6 +105,11 @@ namespace ICSharpCode.Decompiler.Ast
 			return false;
 		}
 
+		static bool IsClosureType(TypeDefinition type)
+		{
+			return type.HasGeneratedName() && type.IsCompilerGenerated() && (type.Name.Contains("DisplayClass") || type.Name.Contains("AnonStorey"));
+		}
+		
 		/// <summary>
 		/// Runs the C# transformations on the compilation unit.
 		/// </summary>