SafeHandleMinusOneIsInvalid SafeHandleMinusOneIsInvalid SafeHandleMinusOneIsInvalid SafeHandleMinusOneIsInvalid Class

Definition

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

public ref class SafeHandleMinusOneIsInvalid abstract : System::Runtime::InteropServices::SafeHandle
[System.Security.SecurityCritical]
public abstract class SafeHandleMinusOneIsInvalid : System.Runtime.InteropServices.SafeHandle
type SafeHandleMinusOneIsInvalid = class
    inherit SafeHandle
Public MustInherit Class SafeHandleMinusOneIsInvalid
Inherits SafeHandle
Inheritance
SafeHandleMinusOneIsInvalidSafeHandleMinusOneIsInvalidSafeHandleMinusOneIsInvalidSafeHandleMinusOneIsInvalid
Derived
Attributes

Remarks

This class derives from the System.Runtime.InteropServices.SafeHandle class. It describes the format of an invalid handle that uses a value of -1. 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 SafeHandleMinusOneIsInvalid.

Warning

This type implements the IDisposable interface. When you have finished using the type, you should dispose of it either directly or indirectly. To dispose of the type directly, call its Dispose method in a try-catch block. To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). For more information, see the "Using an Object that Implements IDisposable" section in the IDisposable interface topic.

Constructors

SafeHandleMinusOneIsInvalid(Boolean) SafeHandleMinusOneIsInvalid(Boolean) SafeHandleMinusOneIsInvalid(Boolean) SafeHandleMinusOneIsInvalid(Boolean)

Initializes a new instance of the SafeHandleMinusOneIsInvalid class, specifying whether the handle is to be reliably released.

Properties

IsClosed IsClosed IsClosed IsClosed

Gets a value indicating whether the handle is closed.

(Inherited from SafeHandle)
IsInvalid IsInvalid IsInvalid IsInvalid

Gets a value that indicates whether the handle is invalid.

Methods

Close() Close() Close() Close()

Marks the handle for releasing and freeing resources.

(Inherited from SafeHandle)
DangerousAddRef(Boolean) DangerousAddRef(Boolean) DangerousAddRef(Boolean) DangerousAddRef(Boolean)

Manually increments the reference counter on SafeHandle instances.

(Inherited from SafeHandle)
DangerousGetHandle() DangerousGetHandle() DangerousGetHandle() DangerousGetHandle()

Returns the value of the handle field.

(Inherited from SafeHandle)
DangerousRelease() DangerousRelease() DangerousRelease() DangerousRelease()

Manually decrements the reference counter on a SafeHandle instance.

(Inherited from SafeHandle)
Dispose() Dispose() Dispose() Dispose()

Releases all resources used by the SafeHandle class.

(Inherited from SafeHandle)
Dispose(Boolean) Dispose(Boolean) Dispose(Boolean) Dispose(Boolean)

Releases the unmanaged resources used by the SafeHandle class specifying whether to perform a normal dispose operation.

(Inherited from SafeHandle)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ReleaseHandle() ReleaseHandle() ReleaseHandle() ReleaseHandle()

When overridden in a derived class, executes the code required to free the handle.

(Inherited from SafeHandle)
SetHandle(IntPtr) SetHandle(IntPtr) SetHandle(IntPtr) SetHandle(IntPtr)

Sets the handle to the specified pre-existing handle.

(Inherited from SafeHandle)
SetHandleAsInvalid() SetHandleAsInvalid() SetHandleAsInvalid() SetHandleAsInvalid()

Marks a handle as no longer used.

(Inherited from SafeHandle)
ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Fields

handle handle handle handle

Specifies the handle to be wrapped.

(Inherited from SafeHandle)

Security

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.

Applies to

See also