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Type.IsInterface Property

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 ReadOnly Property IsInterface As Boolean

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.

' Declare an interface. 
Interface IInterface
End Interface 

Class Example : Implements IInterface
   Public Shared Sub Main()
      ' Determine whether IInterface is an interface. 
       Dim isInterface1 As Boolean = GetType(IInterface).IsInterface
       Console.WriteLine("Is IInterface an interface? {0}", isInterface1)

       ' Determine whether Example is an interface. 
       Dim isInterface2 As Boolean = GetType(Example).IsInterface
       Console.WriteLine("Is Example an interface? {0}", isInterface2)
   End Sub  
End Class  
' The example displays the following output: 
'       Is IInterface an interface? True 
'       Is Example an interface? False

.NET Framework

Supported in: 4.6, 4.5, 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

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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