Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Type.IsAbstract Property

Gets a value indicating whether the Type is abstract and must be overridden.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

public bool IsAbstract { get; }
/** @property */
public final boolean get_IsAbstract ()

public final function get IsAbstract () : boolean

Property Value

true if the Type is abstract; otherwise, false.

If the current Type represents a type parameter of a generic type, this property always returns true. This is because it is not possible to create an instance of a generic type parameter.

The following example returns true if the specified object is abstract; otherwise, it returns false.


using System;
using System.Reflection;
public abstract class MyAbstractClass 
{
}
public class MyClass
{
}
public class Type_IsAbstract
{
    public static void Main()
    {
        try
        {
            // Check whether the return type of MyAbstractClass is abstract or not.
            Console.WriteLine("\nChecking whether the type is abstract.\n"); 
            Console.WriteLine("MyAbstractClass is {0}", (typeof(MyAbstractClass).IsAbstract) ? "an abstract class." : "not an abstract class.");
            // Check whether the return type of MyClass is abstract or not.
            Console.WriteLine("MyClass is {0}", (typeof(MyClass).IsAbstract) ? "an abstract class." : "not an abstract class.");
        }
        catch( Exception e )
        {
            Console.WriteLine( "Exception: {0} \n", e.Message ); 
        }
    }
}

import System.*;
import System.Reflection.*;
abstract public class MyAbstractClass
{
} //MyAbstractClass

public class MyClass
{
} //MyClass

public class Type_IsAbstract
{
    public static void main(String[] args)
    {
        try {
            // Check whether the return type of MyAbstractClass is
            // abstract or not.
            Console.WriteLine("\nChecking whether the type is abstract.\n");
            Console.WriteLine("MyAbstractClass is {0}", (MyAbstractClass.class.
                ToType().get_IsAbstract()) ? "an abstract class." :
                "not an abstract class.");
            // Check whether the return type of MyClass is abstract or not.
            Console.WriteLine("MyClass is {0}", (MyClass.class.ToType().
                get_IsAbstract()) ? "an abstract class." :
                "not an abstract class.");
        }
        catch (System.Exception e) {
            Console.WriteLine("Exception: {0} \n", e.get_Message());
        }
    } //main
} //Type_IsAbstract

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

Show:
© 2014 Microsoft