Type.GetInterface Method (String)


Searches for the interface with the specified name.

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

Public Function GetInterface (
	name As String
) As Type


Type: System.String

The string containing the name of the interface to get. For generic interfaces, this is the mangled name.

Return Value

Type: System.Type

An object representing the interface with the specified name, implemented or inherited by the current Type, if found; otherwise, null.

Exception Condition

name is null.


The current Type represents a type that implements the same generic interface with different type arguments.

The search for name is case-sensitive.

If the current Type represents a constructed generic type, this method returns the Type 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.


For generic interfaces, the name parameter is the mangled name, ending with a grave accent (`) and the number of type parameters. This is true for both generic interface definitions and constructed generic interfaces. For example, to find IExample<T> (IExample(Of T) in Visual Basic) or IExample<string> (IExample(Of String) in Visual Basic), search for "IExample`1".

The following code example uses the GetInterface(String) method to search the Hashtable class for the IDeserializationCallback interface, and lists the methods of the interface.

The code example also demonstrates the GetInterface(String, Boolean) method overload and the GetInterfaceMap method.

   Public Shared Sub Main()
      Dim hashtableObj As New Hashtable()
      Dim objType As Type = hashtableObj.GetType()
      Dim arrayMemberInfo() As MemberInfo
      Dim arrayMethodInfo() As MethodInfo
         ' Get the methods implemented in 'IDeserializationCallback' interface.
         arrayMethodInfo = objType.GetInterface("IDeserializationCallback").GetMethods()
         Console.WriteLine(ControlChars.Cr + "Methods of 'IDeserializationCallback' Interface :")
         Dim index As Integer
         For index = 0 To arrayMethodInfo.Length - 1
         Next index
         ' Get FullName for interface by using Ignore case search.
         Console.WriteLine(ControlChars.Cr + "Methods of 'IEnumerable' Interface")
         arrayMethodInfo = objType.GetInterface("ienumerable", True).GetMethods()
         For index = 0 To arrayMethodInfo.Length - 1
         Next index
         'Get the Interface methods for 'IDictionary' interface
         Dim interfaceMappingObj As InterfaceMapping
         interfaceMappingObj = objType.GetInterfaceMap(GetType(IDictionary))
         arrayMemberInfo = interfaceMappingObj.InterfaceMethods
         Console.WriteLine(ControlChars.Cr + "Hashtable class Implements the following IDictionary Interface methods :")
         For index = 0 To arrayMemberInfo.Length - 1
         Next index
      Catch e As Exception
         Console.WriteLine(("Exception : " + e.ToString()))
      End Try
   End Sub 'Main
End Class 'MyInterfaceClass 

.NET Framework
Available since 1.1
Return to top