C# 特性举例

 [AttributeUsageAttribute(AttributeTargets.All, Inherited = false, AllowMultiple = true)]//通过此定义了一个特性My，可用于任何地方。
    public class MyAttribute : Attribute//构造函数，接受一个参数，一个返回string类型的方法
    {   
        private string str;

        public String Name
        {
            get;
            set;
        }

        public MyAttribute(string s)
        {
            this.str = s;
        }

        public string GetStr()
        {
            return str;
        }
    }

    [My("rxm", Name = "20121126")]
    public class MyClass//用到了此特性的类
    {
        //DO
    }

-----------------------------------------------

 public string GetData()
        {
            Attribute[] atts = Attribute.GetCustomAttributes(typeof(MyClass));

            foreach (Attribute item in atts)
            {
                if (item is MyAttribute)
                {
                    MyAttribute m = (MyAttribute)item;
                    return m.GetStr() + "--" + m.Name;
                }
            }
            return "";
        }