The System.Web.SessionState.SessionStateModule object calls the SessionStateStoreProviderBase.RemoveItem(System.Web.HttpContext, string, object, SessionStateStoreData) method at the end of a request, during the System.Web.HttpApplication.ReleaseRequestState event, to delete the data for a session item from the session data store if the HttpSessionState.Abandon method has been called. Only session data for the current application that matches the supplied session id and lockId values is deleted. For more information about locking and details about the lock identifier, see "Locking Session-Store Data" in the System.Web.SessionState.SessionStateStoreProviderBase class overview.