关于特性的理解和使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 特性
{
    class Program
    {
        static void Main(string[] args)
        {
            A a = new A() {mypeproty=""};
            bAttribute.IsPropetyNull(a);
            aAttribute.print();
            System.Console.Read();
        }
        public class bAttribute : System.Attribute
        {
            /// <summary>
            /// 检查应用是否为空？为空返回true;
            /// </summary>
            /// <param name="ob"></param>
            /// <returns></returns>
            static public bool IsPropetyNull(object ob)
            {
                var ObType = ob.GetType();
                foreach (var propety in ObType.GetProperties())
                {
                    var atrributes = propety.GetCustomAttributes(typeof(bAttribute), false);
                    if (atrributes.Length > 0)
                    {
                        if (propety.GetValue(ob) == null)

                        {
                            Console.WriteLine("为空");
                            return true;
                        }
                        else
                        {
                            Console.WriteLine("不为空");
                            return false;
                        }
                    }



                }
                Console.WriteLine("不为空");
                return false;
            }

        }
        public class aAttribute : System.Attribute
        {
            public static void print()
            {
                Console.WriteLine("hello, a Attribute!");
            }
        }

        class A
        {
           [bAttribute]
            

            public string mypeproty
            {
                set;
                get;
            }
            //[a]
            [bAttribute]
            public string myid
            {
                set;
                get;

            }

        }
    }
}