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Type.GetNestedTypes Method

Returns the public types nested in the current Type.

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

Public Function GetNestedTypes As Type()

Return Value

Type: System.Type()
An array of Type objects representing the public types nested in the current Type (the search is not recursive), or an empty array of type Type if no public types are nested in the current Type.



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.

Only the public types immediately nested in the current type are returned; the search is not recursive.

The following table shows what members of a base class are returned by the Get methods when reflecting on a type.

Member Type








Yes. A field is always hide-by-name-and-signature.


Not applicable

The common type system rule is that the inheritance is the same as that of the methods that implement the property. Reflection treats properties as hide-by-name-and-signature. See note 2 below.



Yes. A method (both virtual and non-virtual) can be hide-by-name or hide-by-name-and-signature.

Nested Type




Not applicable

The common type system rule is that the inheritance is the same as that of the methods that implement the property. Reflection treats properties as hide-by-name-and-signature. See note 2 below.

  1. Hide-by-name-and-signature considers all of the parts of the signature, including custom modifiers, return types, parameter types, sentinels, and unmanaged calling conventions. This is a binary comparison.

  2. For reflection, properties and events are hide-by-name-and-signature. If you have a property with both a get and a set accessor in the base class, but the derived class has only a get accessor, the derived class property hides the base class property, and you will not be able to access the setter on the base class.

  3. Custom attributes are not part of the common type system.

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 Ilasm.exe (IL Assembler).

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

The following example defines a nested class and a struct in MyClass, and then obtains objects of the nested types using the type of MyClass.

Imports System
Imports System.Reflection

Public Class MyClass1
    Public Class NestClass
        Public Shared myPublicInt As Integer = 0
    End Class 'NestClass

    Public Structure NestStruct
        Public myPublicInt As Integer 
    End Structure 'NestStruct
End Class 'MyClass1

Public Class MyMainClass
    Public Shared Sub Main()
            ' Get the Type object corresponding to MyClass. 
            Dim myType As Type = GetType(MyClass1)
            ' Get an array of nested type objects in MyClass.                  
            Dim nestType As Type() = myType.GetNestedTypes()
            Console.WriteLine("The number of nested types is {0}.", nestType.Length)
            Dim t As Type
            For Each t In nestType
                Console.WriteLine("Nested type is {0}.", t.ToString())
            Next t
        Catch e As Exception
            Console.WriteLine("Error", e.Message.ToString())
        End Try 
    End Sub 'Main
End Class 'MyMainClass

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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