void HandleBundlesChanged(object sender, BundleCollectionChangedEventArgs e)
 {
     readOnlyBundlesLock.EnterWriteLock();
     try
     {
         readOnlyBundles = e.Bundles;
     }
     finally
     {
         readOnlyBundlesLock.ExitWriteLock();
     }
 }
 void HandleBundlesChanged(object sender, BundleCollectionChangedEventArgs e)
 {
     readOnlyBundlesLock.EnterWriteLock();
     try
     {
         readOnlyBundles = e.Bundles;
     }
     finally
     {
         readOnlyBundlesLock.ExitWriteLock();
     }
 }