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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 Value

Type: System.Boolean
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()
            // 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 ); 

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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