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MSDN Library

MarshalAsAttribute.MarshalCookie Field

Provides additional information to a custom marshaler.

Namespace:  System.Runtime.InteropServices
Assemblies:   mscorlib (in mscorlib.dll)
  System.Runtime.InteropServices (in System.Runtime.InteropServices.dll)

val mutable MarshalCookie: string

This field is optional when using a custom marshaler.

You can set this field to a string that supplies additional information to a custom marshaler. For example, the same marshaler can be used to provide a number of wrappers, where the cookie is used to indicate the specific wrapper.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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