EventWaitHandleAccessRule Class
Represents a set of access rights allowed or denied for a user or group. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
System.Security.AccessControl::AuthorizationRule
System.Security.AccessControl::AccessRule
System.Security.AccessControl::EventWaitHandleAccessRule
| Name | Description | |
|---|---|---|
 | EventWaitHandleAccessRule(IdentityReference^, EventWaitHandleRights, AccessControlType) | Initializes a new instance of the EventWaitHandleAccessRule class, specifying the user or group the rule applies to, the access rights, and whether the specified access rights are allowed or denied. |
| EventWaitHandleAccessRule(String^, EventWaitHandleRights, AccessControlType) | Initializes a new instance of the EventWaitHandleAccessRule class, specifying the name of the user or group the rule applies to, the access rights, and whether the specified access rights are allowed or denied. |
| Name | Description | |
|---|---|---|
 | AccessControlType | Gets the AccessControlType value associated with this AccessRule object.(Inherited from AccessRule.) |
 | AccessMask | Gets the access mask for this rule.(Inherited from AuthorizationRule.) |
| EventWaitHandleRights | Gets the rights allowed or denied by the access rule. |
| IdentityReference | Gets the IdentityReference to which this rule applies.(Inherited from AuthorizationRule.) |
| InheritanceFlags | Gets the value of flags that determine how this rule is inherited by child objects.(Inherited from AuthorizationRule.) |
| IsInherited | Gets a value indicating whether this rule is explicitly set or is inherited from a parent container object.(Inherited from AuthorizationRule.) |
| PropagationFlags | Gets the value of the propagation flags, which determine how inheritance of this rule is propagated to child objects. This property is significant only when the value of the InheritanceFlags enumeration is not None.(Inherited from AuthorizationRule.) |
| Name | Description | |
|---|---|---|
| Equals(Object^) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
| GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
| GetType() | |
| ToString() | Returns a string that represents the current object.(Inherited from Object.) |
The EventWaitHandleAccessRule class is one of a set of classes that the .NET Framework provides for managing Windows access control security on named system events. For an overview of these classes, and their relationship to the underlying Windows access control structures, see EventWaitHandleSecurity.
 Note |
|---|
Windows access control security is meaningful only for named system events. If an EventWaitHandle object represents a local event, access control is irrelevant. |
To get a list of the rules currently applied to a named event, use the EventWaitHandle::GetAccessControl method to get an EventWaitHandleSecurity object, and then use its GetAccessRules method to obtain a collection of EventWaitHandleAccessRule objects.
EventWaitHandleAccessRule objects do not map one-to-one with access control entries in the underlying discretionary access control list (DACL). When you get the set of all access rules for an event, the set contains the minimum number of rules currently required to express all the access control entries.
| Note |
|---|
The underlying access control entries change as you apply and remove rules. The information in rules is merged if possible, to maintain the smallest number of access control entries. Thus, when you get the current list of rules, it might not look exactly like the list of all the rules you have added. |
Use EventWaitHandleAccessRule objects to specify the access rights to allow or deny to a user or group. An EventWaitHandleAccessRule object always represents either allowed access or denied access, never both.
To apply a rule to a named system event, use the EventWaitHandle::GetAccessControl method to get the EventWaitHandleSecurity object. Modify the EventWaitHandleSecurity object by using its methods to add the rule, and then use the EventWaitHandle::SetAccessControl method to reattach the security object.
 Important |
|---|
Changes you make to an EventWaitHandleSecurity object do not affect the access levels of the named event until you call the EventWaitHandle::SetAccessControl method to assign the altered security object to the named event. |
EventWaitHandleAccessRule objects are immutable. Security for an event is modified using the methods of the EventWaitHandleSecurity class to add or remove rules; as you do this, the underlying access control entries are modified.
| Note |
|---|
Security on synchronization objects is not supported for Windows 98 or Windows Millennium Edition. |
The following code example demonstrates the creation and use of EventWaitHandleAccessRule objects. The example creates an EventWaitHandleSecurity object, adds rules that allow and deny various rights for the current user, and displays the resulting pair of rules. The example then allows new rights for the current user and displays the result, showing that the new rights are merged with the existing Allowrule.
| Note |
|---|
This example does not attach the security object to a EventWaitHandle object. Examples that attach security objects can be found in EventWaitHandle::GetAccessControl and EventWaitHandle::SetAccessControl. |
Available since 2.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.