internal class ExtensionObjectURL

     {

         internal string name { get; set; }

     }

     internal static class Extension

     {

         internal static void NotifycationPropertyChanged<T, TProperty>(this T propertyChangedBase, Expression<Func<T, TProperty>> expression)

         {

             var body = expression.Body as MemberExpression;

             if (body != null)

             {

                 var propertyName = body.Member.Name;

                 // 做点神马呗

                 return;

             }

             throw new InvalidOperationException("指定的expression无效,expression必须是对象的（属性,字段）成员的访问表达式。");

         }

         internal void ss()

         {

             var s = new ExtensionObjectURL();

             s.NotifycationPropertyChanged(p => p.);

         }

     }