Frees all substructures pointed to by the specified unmanaged memory block.
Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
<ComVisibleAttribute(True)> _
Public Shared Sub DestroyStructure ( _
ptr As IntPtr, _
structuretype As Type _
)
Dim ptr As IntPtr
Dim structuretype As Type
Marshal.DestroyStructure(ptr, structuretype)
[ComVisibleAttribute(true)]
public static void DestroyStructure (
IntPtr ptr,
Type structuretype
)
[ComVisibleAttribute(true)]
public:
static void DestroyStructure (
IntPtr ptr,
Type^ structuretype
)
/** @attribute ComVisibleAttribute(true) */
public static void DestroyStructure (
IntPtr ptr,
Type structuretype
)
ComVisibleAttribute(true)
public static function DestroyStructure (
ptr : IntPtr,
structuretype : Type
)
Parameters
- ptr
A pointer to an unmanaged block of memory.
- structuretype
Type of a formatted class. This provides the layout information necessary to delete the buffer in the ptr parameter.
| Exception type | Condition |
|---|
ArgumentException | structureType has an automatic layout. Use sequential or explicit instead. |
You can use this method to free reference-type fields, such as strings, of an unmanaged structure. Unlike its fields, a structure can be a value type or reference type. Value-type structures containing value-type fields (all blittable) have no references whose memory must be freed. StructureToPtr uses this method to prevent memory leaks when reusing memory occupied by a structure.
DestroyStructure calls the SysFreeString COM API method, which in turn frees an allocated string. For additional information about SysFreeString, see the MSDN Library.
In addition to DestroyStructure, the Marshal class provides two other memory-deallocation methods: Marshal.FreeCoTaskMem and Marshal.FreeHGlobal.
Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
.NET Framework
Supported in: 2.0, 1.1, 1.0