class Program
    {
        static void Main(string[] args)
        {
            var source = new MyType();

            source.IsTypeOf(MyType.Type);  //例子
            MyType.IsMyType(source);       //IsMyType比较合适点
          //MyType.IsTypeOf(source);       //看起来比较奇怪啊
        }
    }
    public static class TypeExtention
    {
        public static bool IsTypeOf(this object source, Type target)
        {
            return true;
        }
    }
    public class MyType
    {
        public static Type Type
        {
            get { return typeof(MyType); }
        }
        public static bool IsMyType(object type)
        {
            return true;
        }
    }