Use a named attribute parameter

// Use a named attribute parameter. 
  
using System;  
using System.Reflection; 
  
[AttributeUsage(AttributeTargets.All)] 
class RemarkAttribute : Attribute { 
  string remarkValue; // underlies remark property 
 
  public string supplement; // this is a named parameter 
 
  public RemarkAttribute(string comment) { 
    remarkValue = comment; 
    supplement = "None"; 
  } 
 
  public string remark { 
    get { 
      return remarkValue; 
    } 
  } 
}  
 
[RemarkAttribute("This class uses an attribute.", 
                 supplement = "This is additional info.")] 
class UseAttrib { 
  // ... 
} 
 
public class NamedParamDemo {  
  public static void Main() {  
    Type t = typeof(UseAttrib); 
 
    Console.Write("Attributes in " + t.Name + ": "); 
 
    object[] attribs = t.GetCustomAttributes(false);  
    foreach(object o in attribs) { 
      Console.WriteLine(o); 
    } 
 
    // Retrieve the RemarkAttribute. 
    Type tRemAtt = typeof(RemarkAttribute); 
    RemarkAttribute ra = (RemarkAttribute) 
          Attribute.GetCustomAttribute(t, tRemAtt); 
 
    Console.Write("Remark: "); 
    Console.WriteLine(ra.remark); 
 
    Console.Write("Supplement: "); 
    Console.WriteLine(ra.supplement); 
  }  
}

1.	Subclass System.Attribute
2.	A simple attribute example
3.	Creating and using a class attribute.
4.	Attribute in class inheritance
5.	Defining New Attribute Classes
6.	Use AttributeUsage
7.	Use a property as a named attribute parameter
8.	Demonstrate the Conditional attribute
9.	Define contant and use it in Conditional attribute
10.	Demonstrate the Obsolete attribute
11.	Illustrates use of the Obsolete attribute
12.	Compiles into a library defining the RamdomSupplier attribute and the RandomMethod attribute
13.	Shows the use of assembly attributes
14.	How to create a custom attribute
15.	Illustrates use of the Conditional attribute
16.	Illustrates the GetCustomAttributes method
17.	demonstrates the flags attribute of an enumeration

Use a named attribute parameter : Attribute « Language Basics « C# / C Sharp

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