Marshal.ZeroFreeCoTaskMemUnicode Method

Frees an unmanaged string pointer that was allocated using the SecureStringToCoTaskMemUnicode method.

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

Public Shared Sub ZeroFreeCoTaskMemUnicode ( _
	s As IntPtr _
Dim s As IntPtr

public static void ZeroFreeCoTaskMemUnicode (
	IntPtr s
public static function ZeroFreeCoTaskMemUnicode (
	s : IntPtr
Not applicable.



The address of the unmanaged string to free.

The ZeroFreeCoTaskMemUnicode method first zeros out and then frees unmanaged memory that was allocated using the SecureStringToCoTaskMemUnicode method.


This method uses SecurityAction.LinkDemand to prevent it from being called from untrusted code; only the immediate caller is required to have SecurityPermissionAttribute.UnmanagedCode permission. If your code can be called from partially trusted code, do not pass user input to Marshal class methods without validation. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0