Type.IsInterface Property

Reference

Definition

Namespace:: System

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Type.CoreCLR.cs

Source:: Type.CoreCLR.cs

Source:: Type.cs

Important

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

public:
 property bool IsInterface { bool get(); };

public bool IsInterface { get; }

member this.IsInterface : bool

Public ReadOnly Property IsInterface As Boolean

Property Value

Boolean

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

Implements

IsInterface

Examples

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

using namespace System;

// Declare an interface.
interface class myIFace{};
public ref class MyIsInterface{};

void main()
{
   try
   {
      // Get the IsInterface attribute for myIFace.
      bool myBool1 = myIFace::typeid->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 = MyIsInterface::typeid->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 );
   }
}
/* The example produces the following output:

Is the specified type an interface? True.
Is the specified type an interface? False.
*/

using System;
// Declare an interface.
interface myIFace
{
}
class MyIsInterface
{
    public static void Main(string []args)
    {
        try
        {
            // 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);
        }
    }
}
/* The example produces the following output:

Is the specified type an interface? True.
Is the specified type an interface? False.
*/

// Declare an interface.
type myIFace = interface end

type MyIsInterface = class end

try
    // Get the IsInterface attribute for myIFace.
    let myBool1 = typeof<myIFace>.IsInterface
    //Display the IsInterface attribute for myIFace.
    printfn $"Is the specified type an interface? {myBool1}."
    // Get the attribute IsInterface for MyIsInterface.
    let myBool2 = typeof<MyIsInterface>.IsInterface
    //Display the IsInterface attribute for MyIsInterface.
    printfn $"Is the specified type an interface? {myBool2}."
with e ->
    printfn $"\nAn exception occurred: {e.Message}."
(* The example produces the following output:

Is the specified type an interface? True.
Is the specified type an interface? False.
*)

' Declare an interface.
Interface myIFace
End Interface

Class MyIsInterface
    Public Shared Sub Main()
        ' Get the IsInterface attribute for myIFace.
        Dim myBool1 As Boolean = GetType(myIFace).IsInterface
        Console.WriteLine("Is the specified type an interface? {0}.", myBool1)

        ' Determine whether Example is an interface.
        Dim myBool2 As Boolean = GetType(MyIsInterface).IsInterface
        Console.WriteLine("Is the specified type an interface? {0}.", myBool2)
        Console.ReadLine()

    End Sub
End Class
' The example displays the following output:
'       Is the specified type an interface? True.
'       Is the specified type an interface? False.

Remarks

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.

Applies to

Продукт	Версии
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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