SafeHandle Constructor

Note: This constructor is new in the .NET Framework version 2.0.

Initializes a new instance of the SafeHandle class with the specified invalid handle value.

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

protected SafeHandle (
	IntPtr invalidHandleValue,
	bool ownsHandle
protected SafeHandle (
	IntPtr invalidHandleValue, 
	boolean ownsHandle
protected function SafeHandle (
	invalidHandleValue : IntPtr, 
	ownsHandle : boolean



The value of an invalid handle (usually 0 or -1). Your implementation of IsInvalid should return true for this value.


true to reliably let SafeHandle release the handle during the finalization phase; otherwise, false (not recommended).

Exception typeCondition


The derived class resides in an assembly without unmanaged code access permission.

If the ownsHandle parameter is false, ReleaseHandle is never called; thus, it is not recommended to use this parameter value as your code may leak resources.

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