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CriticalHandleZeroOrMinusOneIsInvalid Class

Provides a base class for Win32 critical handle implementations in which the value of either 0 or -1 indicates an invalid handle.

Namespace:  Microsoft.Win32.SafeHandles
Assembly:  mscorlib (in mscorlib.dll)

[SecurityPermissionAttribute(SecurityAction.LinkDemand, UnmanagedCode = true)]
[SecurityPermissionAttribute(SecurityAction.InheritanceDemand, UnmanagedCode = true)]
public abstract class CriticalHandleZeroOrMinusOneIsInvalid : CriticalHandle

This class derives from the System.Runtime.InteropServices.CriticalHandle class. It describes the format of an invalid handle. For example, some handles use -1 as an invalid handle value, while others use 0. Further derivations of this class (for example, file or registry handles) can specialize this further.

Use the CriticalHandleZeroOrMinusOneIsInvalid class when you need to wrap an unmanaged resource that does not have an existing managed wrapper.

NoteNote:

See the CriticalHandle class for important information on critical handle security and thread safety.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

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