internal void MonitorDependencyChanges()
{
// need to protect against the item being closed
CacheDependency dependency = _dependency;
if (dependency != null && State == EntryState.AddedToCache)
{
if (!dependency.TakeOwnership())
{
throw new InvalidOperationException(
SR.GetString(SR.Cache_dependency_used_more_that_once));
}
dependency.SetCacheDependencyChanged((Object sender, EventArgs args) => {
DependencyChanged(sender, args);
});
}
}
