Copies the contents of a managed String to a block of memory allocated from the unmanaged COM task allocator.
Assembly: mscorlib (in mscorlib.dll)
- Type: System.String
A managed string to be copied.
Return ValueType: System.IntPtr
An integer representing a pointer to the block of memory allocated for the string, or 0 if s is a null reference (Nothing in Visual Basic).
is useful for custom marshaling or for use when mixing managed and unmanaged code. Because this method allocates the unmanaged memory required for a string, always free the memory by calling Marshal.FreeCoTaskMem. This method provides the opposite functionality of Marshal.PtrToStringUni. The characters of the string are copied as Unicode characters.
requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.
Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), 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.