C# 特性（Attribute）

 1     [AttributeUsage(AttributeTargets.Class)]///特性应用范围
 2     public class IsDbTable:System.Attribute///继承特性基性
 3     {
 4         public string tablename{get;set;}
 5         public IsDbTable(string tableName)
 6         {
 7             this.tablename = tableName;
 8         }
 9         private IsDbTable() { }
10     }
11     [AttributeUsage(AttributeTargets.Property)]
12     public class IsNotDbValue : System.Attribute
13     {
14     }
15 
16     [AttributeUsage(AttributeTargets.Property)]
17     public class DbFiltering:System.Attribute
18     {
19         public string FilteringRules { get; set; }
20         public DbFiltering(string Filteringrules)
21         {
22             this.FilteringRules = Filteringrules;
23         }
24     }

System.Attribute.GetCustomAttribute(p, typeof(IsNotDbValue))///获取属性特性