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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

Not applicable.

Property Value

true if the Type is abstract; otherwise, false.

If the current Type represents a type parameter in the definition of a generic type or generic method, this property always returns false.

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 Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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