SafeHandleZeroOrMinusOneIsInvalid Class
Microsoft Silverlight will reach end of support after October 2021. Learn more.
This type can be used only by trusted applications. If you try to use its members in a partial-trust application, your code will throw a MethodAccessException exception. This type is security-critical, which restricts its use.
[SECURITY CRITICAL]
Provides a base class for Win32 safe handle implementations in which the value of either 0 or -1 indicates an invalid handle.
Inheritance Hierarchy
System.Object
System.Runtime.ConstrainedExecution.CriticalFinalizerObject
System.Runtime.InteropServices.SafeHandle
Microsoft.Win32.SafeHandles.SafeHandleZeroOrMinusOneIsInvalid
Microsoft.Win32.SafeHandles.SafeWaitHandle
Namespace: Microsoft.Win32.SafeHandles
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<SecurityCriticalAttribute> _
Public MustInherit Class SafeHandleZeroOrMinusOneIsInvalid _
Inherits SafeHandle
[SecurityCriticalAttribute]
public abstract class SafeHandleZeroOrMinusOneIsInvalid : SafeHandle
The SafeHandleZeroOrMinusOneIsInvalid type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
.gif "Protected method") .gif "Supported by Silverlight for Windows Phone") .gif "Supported by Xbox 360") |
SafeHandleZeroOrMinusOneIsInvalid | Initializes a new instance of the SafeHandleZeroOrMinusOneIsInvalid class, specifying whether the handle is to be reliably released. |
Top
Properties
| Name | Description | |
|---|---|---|
.gif "Public property") |
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.) |
Top
Methods
| Name | Description | |
|---|---|---|
.gif "Public method") |
Close | Security Critical. Marks the handle for releasing and freeing resources. (Inherited from SafeHandle.) |
|
DangerousAddRef | Security Critical. Manually increments the reference counter on SafeHandle instances. (Inherited from SafeHandle.) |
|
DangerousGetHandle | Returns the value of the handle field. (Inherited from SafeHandle.) |
|
DangerousRelease | Security Critical. 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) | Security Critical. 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 | Security Critical. Marks a handle as no longer used. (Inherited from SafeHandle.) |
|
ToString | Returns a string that represents the current object. (Inherited from Object.) |
Top
.gif "Protected field")
Version Information
Silverlight
Supported in: 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
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.