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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*=============================================================================
**
**
**
** Purpose: Methods used to customize the creation of managed objects that
** extend from unmanaged objects.
**
**
=============================================================================*/
namespace System.Runtime.InteropServices {
using System.Runtime.InteropServices;
using System.Runtime.Remoting;
using System.Runtime.CompilerServices;
using System.Runtime.Versioning;
using System;
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class ExtensibleClassFactory
{
// Prevent instantiation.
private ExtensibleClassFactory() {}
// Register a delegate that will be called whenever an instance of a managed
// type that extends from an unmanaged type needs to allocate the aggregated
// unmanaged object. This delegate is expected to allocate and aggregate the
// unmanaged object and is called in place of a CoCreateInstance. This
// routine must be called in the context of the static initializer for the
// class for which the callbacks will be made.
// It is not legal to register this callback from a class that has any
// parents that have already registered a callback.
[System.Security.SecuritySafeCritical] // auto-generated
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern void RegisterObjectCreationCallback(ObjectCreationDelegate callback);
}
}
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