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Marshal.FreeCoTaskMem Method

.NET Framework 4.5

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

Frees a block of memory allocated by the unmanaged COM task memory allocator.

Namespace:  System.Runtime.InteropServices
Assembly:  mscorlib (in mscorlib.dll)
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public static void FreeCoTaskMem(
	IntPtr ptr
)

Parameters

ptr
Type: System.IntPtr
The address of the memory to be freed.

You can use FreeCoTaskMem to free any memory allocated by AllocCoTaskMem, ReAllocCoTaskMem, or any equivalent unmanaged method. If the ptr parameter is null, the method does nothing.

FreeCoTaskMem exposes the COM CoTaskMemFree function, which frees all bytes so that you can no longer use the memory that the ptr parameter points to.

In addition to FreeCoTaskMem, the Marshal class provides two other memory-deallocation methods: DestroyStructure and FreeHGlobal.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library
  • SecurityCriticalAttribute  

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

Windows 8 Release Preview, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 SP2, Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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