Marshal.StringToCoTaskMemUni Method
Copies the contents of a managed String to a block of memory allocated from the unmanaged COM task allocator.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- s
- Type: System.String
A managed string to be copied.
Return Value
Type: System.IntPtrAn integer representing a pointer to the block of memory allocated for the string, or 0 if s is null.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException |
The s parameter exceeds the maximum length allowed by the operating system. |
| OutOfMemoryException |
There is insufficient memory available. |
StringToCoTaskMemUni 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.
-
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.
