C# 0 The Complete Reference

Type

.

Type

 is a large 

class with many members, and a discussion is deferred until the next section, where reflection 

is examined. However, to briefly demonstrate 

Type

, the following program uses three of 

its properties: 

FullName

,

IsClass

, and 

IsAbstract

. To obtain the full name of the type, use 

FullName

.

IsClass

 returns true if the type is a class. 

IsAbstract

 returns true if a class is abstract.

// Demonstrate typeof.

using System;

using System.IO;

class UseTypeof {

  static void Main() {

    Type t = typeof(StreamReader);

    Console.WriteLine(t.FullName);

    if(t.IsClass) Console.WriteLine("Is a class.");

    if(t.IsAbstract) Console.WriteLine("Is abstract.");

    else Console.WriteLine("Is concrete.");

  }

}

This program outputs the following:

System.IO.StreamReader

Is a class.

Is concrete.

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