Csharp/CSharp Tutorial/Attribute/AttributeUsage

AttributeUsage

The AttributeUsage attribute specifies the types of items to which an attribute can be applied.

AttributeUsage is another name for the System.AttributeUsageAttribute class.

AttributeUsage has the following constructor:

<source lang="csharp">AttributeUsage(AttributeTargets item)</source>

Define a attribute for remark

<source lang="csharp">using System; [AttributeUsage(AttributeTargets.All)] public class MyAttribute : Attribute {

 string remark;

 public MyAttribute(string comment) { 
   remark = comment; 
 } 

 public string Remark { 
   get { 
     return remark; 
   } 
 } 

}</source>