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Type.GetNestedTypes Method ()

Returns the public types nested in the current Type.

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

'Declaration
Public Function GetNestedTypes As Type()
'Usage
Dim instance As Type
Dim returnValue As Type()

returnValue = instance.GetNestedTypes
public final Type[] GetNestedTypes ()
public final function GetNestedTypes () : Type[]

Return Value

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.

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

Static

Non-Static

Constructor

No

No

Field

No

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

Event

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.

Method

No

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

Nested Type

No

No

Property

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.

NoteNote

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 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()
        Try
            ' 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

import System.*;
import System.Reflection.*;

public class MyClass
{
    public static class NestClass
    {
        public static int myPublicInt = 0;
    } //NestClass

    public static class NestStruct
    {
        public static int myPublicInt = 0;
    } //NestStruct
} //MyClass

public class MyMainClass
{
    public static void main(String[] args)
    {
        try {
            // Get the Type object corresponding to MyClass.
            Type myType = MyClass.class.ToType();
            // Get an array of nested type objects in MyClass. 
            Type nestType[] = myType.GetNestedTypes();
            Console.WriteLine("The number of nested types is {0}.",
                System.Convert.ToString(nestType.get_Length()));
            for (int iCtr = 0; iCtr < nestType.get_Length(); iCtr++) {
                Type t = nestType[iCtr];
                Console.WriteLine("Nested type is {0}.", t.ToString());
            }
        }
        catch (System.Exception e) {
            Console.WriteLine("Error" + e.get_Message());
        }
    } //main
} //MyMainClass

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

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