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Type.GetNestedTypes Method (BindingFlags)

When overridden in a derived class, searches for the types nested in the current Type, using the specified binding constraints.

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

Public MustOverride Function GetNestedTypes ( _
	bindingAttr As BindingFlags _
) As Type()
Dim instance As Type 
Dim bindingAttr As BindingFlags 
Dim returnValue As Type()

returnValue = instance.GetNestedTypes(bindingAttr)


Type: System.Reflection.BindingFlags

A bitmask comprised of one or more BindingFlags that specify how the search is conducted.


Zero, to return Nothing.

Return Value

Type: System.Type()
An array of Type objects representing all the types nested in the current Type that match the specified binding constraints (the search is not recursive), or an empty array of type Type, if no nested types are found that match the binding constraints.



The search for nested types is not recursive.

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

The following BindingFlags filter flags can be used to define which nested types to include in the search:

  • You must specify either BindingFlags.Public or BindingFlags.NonPublic to get a return.

  • Specify BindingFlags.Public to include public nested types in the search.

  • Specify BindingFlags.NonPublic to include non-public nested types (that is, private and protected nested types) in the search.

This method returns only the nested types of the current type. It does not search the base classes of the current type. To find types that are nested in base classes, you must walk the inheritance hierarchy, calling GetNestedTypes at each level.

BindingFlags.Instance and BindingFlags.Static are ignored.

Calling this method with only the BindingFlags.Public flag or only the BindingFlags.NonPublic flag will return the specified nested types and does not require any other flags.

See System.Reflection.BindingFlags for more information.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the nested types of the class constraint.

If a nested type is generic, this method returns its generic type definition. This is true even if the enclosing generic type is a closed constructed type.


If the current Type represents a generic type defined in C#, Visual Basic, or C++, its nested types are all generic even if they have no generic parameters of their own. This is not necessarily true of nested types defined in dynamic assemblies or compiled with the MSIL Assembler (Ilasm.exe).

For information on nested generic types, and on constructing nested generic types from their generic type definitions, see MakeGenericType.

The following example creates two nested public classes and two nested protected classes, and displays information for classes that match the specified binding constraints.

Imports System
Imports System.Reflection
Imports System.Reflection.Emit
Imports Microsoft.VisualBasic

' Create a class with name 'MyTypeClass' with three properties. 
Public Class MyTypeClass

    Public Class Myclass1
    End Class 'Myclass1

    Public Class Myclass2
    End Class 'Myclass2

    Protected Class MyClass3
    End Class 'MyClass3

    Protected Class MyClass4
    End Class 'MyClass4
End Class 'MyTypeClass

Public Class TypeMain

    Public Shared Sub Main()

        Dim myType As Type = GetType(MyTypeClass)
        ' Get the public nested classes. 
        Dim myTypeArray As Type() = myType.GetNestedTypes((BindingFlags.Public Or BindingFlags.Instance))
        Console.WriteLine("The number of public nested classes is {0}.", myTypeArray.Length.ToString())
        ' Display all the public nested classes.
        ' Get the nonpublic nested classes. 
        Dim myTypeArray1 As Type() = myType.GetNestedTypes((BindingFlags.NonPublic Or BindingFlags.Instance))
        Console.WriteLine("The number of protected nested classes is {0}.", myTypeArray1.Length.ToString())
        ' Display  the information for all nested classes.
    End Sub 'Main

    Public Shared Sub DisplayTypeInfo(ByVal myArrayType() As Type)
        ' Display the information for all nested classes. 
        Dim i As Integer 
        For i = 0 To myArrayType.Length - 1
            Dim myType As Type = CType(myArrayType(i), Type)
            Console.WriteLine("The name of the nested class is {0}.", myType.ToString())
        Next i
    End Sub 'DisplayTypeInfo
End Class 'TypeMain 

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0