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SafeHandleZeroOrMinusOneIsInvalid Class

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

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

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

public ref class SafeHandleZeroOrMinusOneIsInvalid abstract : public SafeHandle
public abstract class SafeHandleZeroOrMinusOneIsInvalid extends SafeHandle
public abstract class SafeHandleZeroOrMinusOneIsInvalid extends SafeHandle

This class derives from the System.Runtime.InteropServices.SafeHandle 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. See the SafeFileHandle class for an example of a class that derives from SafeHandleZeroOrMinusOneIsInvalid.

Use the SafeHandleZeroOrMinusOneIsInvalid class whenever you need to safely wrap an unmanaged resource that does not have an existing managed wrapper.

The following code example demonstrates how to create a class that derives from the SafeHandleZeroOrMinusOneIsInvalid class. This example creates a class that wraps a pointer to unmanaged memory.

No code example is currently available or this language may not be supported.

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 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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

.NET Compact Framework

Supported in: 2.0
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