Type.GetInterfaces Method

'Declaration
Public MustOverride Function GetInterfaces As Type()

Implements

The GetInterfaces method does not return interfaces in a particular order, such as alphabetical or declaration order. Your code must not depend on the order in which interfaces are returned, because that order varies.

If the current Type represents a constructed generic type, this method returns the Type objects with the type parameters replaced by the appropriate type arguments.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the interface constraints and any interfaces inherited from class or interface constraints.

The following example gets the type of the specified class and displays all the interfaces that the type implements or inherits. To compile the Visual Basic example, use the following compiler commands:

vbc type_getinterfaces1.vb /r:System.Web.dll /r:System.dll

Imports System.Collections.Generic

Public Class Example

    Shared Sub Main()

        Console.WriteLine(vbCrLf & _
            "Interfaces implemented by Dictionary(Of Integer, String):" & vbCrLf)

        For Each tinterface As Type In GetType(Dictionary(Of Integer, String)).GetInterfaces()

            Console.WriteLine(tinterface.ToString())

        Next 

        'Console.ReadLine()      ' Uncomment this line for Visual Studio.  
    End Sub 
End Class 

' This example produces output similar to the following: 
' 
'Interfaces implemented by Dictionary(Of Integer, String): 
'System.Collections.Generic.IDictionary`2[System.Int32,System.String] 
'System.Collections.Generic.ICollection`1[System.Collections.Generic.KeyValuePair`2[System.Int32,System.String]] 
'System.Collections.Generic.IEnumerable`1[System.Collections.Generic.KeyValuePair`2[System.Int32,System.String]] 
'System.Collection.IEnumerable 
'System.Collection.IDictionary 
'System.Collection.ICollection 
'System.Runtime.Serialization.ISerializable 
'System.Runtime.Serialization.IDeserializationCallback

.NET Framework

.NET Framework Client Profile

Portable Class Library

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.

Reference