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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 Example
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
         // Check whether the return type of MyAbstractClass is abstract or not.
         outputBlock.Text += "\nChecking whether the type is abstract.\n" + "\n";
         outputBlock.Text += String.Format("MyAbstractClass is {0}", (typeof(MyAbstractClass).IsAbstract) ? "an abstract class." : "not an abstract class.") + "\n";
         // Check whether the return type of MyClass is abstract or not.
         outputBlock.Text += String.Format("MyClass is {0}", (typeof(MyClass).IsAbstract) ? "an abstract class." : "not an abstract class.") + "\n";
      catch (Exception e)
         outputBlock.Text += String.Format("Exception: {0} \n", e.Message) + "\n";


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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