SafeHandleZeroOrMinusOneIsInvalid Class
Provides a base class for Win32 safe handle implementations in which the value of either 0 or -1 indicates an invalid handle.
System.Runtime.ConstrainedExecution::CriticalFinalizerObject
System.Runtime.InteropServices::SafeHandle
Microsoft.Win32.SafeHandles::SafeHandleZeroOrMinusOneIsInvalid
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Assembly: mscorlib (in mscorlib.dll)
The SafeHandleZeroOrMinusOneIsInvalid type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | SafeHandleZeroOrMinusOneIsInvalid | Initializes a new instance of the SafeHandleZeroOrMinusOneIsInvalid class, specifying whether the handle is to be reliably released. |
| Name | Description | |
|---|---|---|
![]() | IsClosed | Gets a value indicating whether the handle is closed. (Inherited from SafeHandle.) |
![]() | IsInvalid | Gets a value that indicates whether the handle is invalid. (Overrides SafeHandle::IsInvalid.) |
| Name | Description | |
|---|---|---|
![]() | Close | Marks the handle for releasing and freeing resources. (Inherited from SafeHandle.) |
![]() | DangerousAddRef | Manually increments the reference counter on SafeHandle instances. (Inherited from SafeHandle.) |
![]() | DangerousGetHandle | Returns the value of the handle field. (Inherited from SafeHandle.) |
![]() | DangerousRelease | Manually decrements the reference counter on a SafeHandle instance. (Inherited from SafeHandle.) |
![]() | Dispose() | Releases all resources used by the SafeHandle class. (Inherited from SafeHandle.) |
![]() | Dispose(Boolean) | Releases the unmanaged resources used by the SafeHandle class specifying whether to perform a normal dispose operation. (Inherited from SafeHandle.) |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Frees all resources associated with the handle. (Inherited from SafeHandle.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ReleaseHandle | When overridden in a derived class, executes the code required to free the handle. (Inherited from SafeHandle.) |
![]() | SetHandle | Sets the handle to the specified pre-existing handle. (Inherited from SafeHandle.) |
![]() | SetHandleAsInvalid | Marks a handle as no longer used. (Inherited from SafeHandle.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
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.
- InheritanceDemand
for full trust for inheritors. This member cannot be inherited by partially trusted code.
- 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.
System.Runtime.ConstrainedExecution::CriticalFinalizerObject
System.Runtime.InteropServices::SafeHandle
Microsoft.Win32.SafeHandles::SafeHandleZeroOrMinusOneIsInvalid
Microsoft.Win32.SafeHandles::SafeFileHandle
Microsoft.Win32.SafeHandles::SafeMemoryMappedFileHandle
Microsoft.Win32.SafeHandles::SafeNCryptHandle
Microsoft.Win32.SafeHandles::SafePipeHandle
Microsoft.Win32.SafeHandles::SafeRegistryHandle
Microsoft.Win32.SafeHandles::SafeWaitHandle
System.Runtime.InteropServices::SafeBuffer
System.Security.Authentication.ExtendedProtection::ChannelBinding
