ZeroFreeBSTR Method
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Marshal.ZeroFreeBSTR Method

Frees a BSTR Data Type pointer that was allocated using the SecureStringToBSTR method.

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

public static void ZeroFreeBSTR(
	IntPtr s


Type: System.IntPtr
The address of the BSTR to free.

The ZeroFreeBSTR method first sets the contents of the BSTR to zero, and then frees the BSTR.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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