public static void Main() { // Create a string representing the current user. string user = Environment.UserDomainName + "\\" + Environment.UserName; // Create a security object that grants no access. EventWaitHandleSecurity mSec = new EventWaitHandleSecurity(); // Add a rule that grants the current user the // right to wait on or signal the event. EventWaitHandleAccessRule rule = new EventWaitHandleAccessRule(user, EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify, AccessControlType.Allow); mSec.AddAccessRule(rule); // Add a rule that denies the current user the // right to change permissions on the event. rule = new EventWaitHandleAccessRule(user, EventWaitHandleRights.ChangePermissions, AccessControlType.Deny); mSec.AddAccessRule(rule); // Display the rules in the security object. ShowSecurity(mSec); // Add a rule that allows the current user the // right to read permissions on the event. This rule // is merged with the existing Allow rule. rule = new EventWaitHandleAccessRule(user, EventWaitHandleRights.ReadPermissions, AccessControlType.Allow); mSec.AddAccessRule(rule); ShowSecurity(mSec); // Create a rule that allows the current user to // take ownership of the event, and use that rule // to remove the existing Allow rule from the // EventWaitHandleSecurity object, showing that the user // and access type must match, while the rights are // ignored. Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule."); rule = new EventWaitHandleAccessRule(user, EventWaitHandleRights.TakeOwnership, AccessControlType.Allow); mSec.RemoveAccessRuleAll(rule); ShowSecurity(mSec); }