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Type.IsInterface Property


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Gets a value indicating whether the Type is an interface; that is, not a class or a value type.

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

public bool IsInterface { get; }

Property Value

Type: System.Boolean

true if the Type is an interface; otherwise, false.

The ClassSemanticsMask distinguishes a type declaration as class, interface or value type.

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

This property is read-only.

The following example creates an interface, checks for the interface type, and indicates whether a class has the IsInterface property set.

using System;
// Declare an interface.
interface myIFace
class MyIsInterface 
    public static void Main(string []args)
            // Get the IsInterface attribute for myIFace.
            bool myBool1 = typeof(myIFace).IsInterface;    
            //Display the IsInterface attribute for myIFace.
            Console.WriteLine("Is the specified type an interface? {0}.", myBool1);
            // Get the attribute IsInterface for MyIsInterface.
            bool myBool2 = typeof(MyIsInterface).IsInterface;    
            //Display the IsInterface attribute for MyIsInterface.
            Console.WriteLine("Is the specified type an interface? {0}.", myBool2);         
        catch(Exception e)
            Console.WriteLine("\nAn exception occurred: {0}.", e.Message);

.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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