c# - Catel (MVVM framework) ObservableCollection -

i'm using catel implement wpf application.

i have class extends observablecollection , every time item inserted ui must updated.

code (simplified version) :

  public abstract class logcollections : observablecollection<log4netlog>  {      private readonly object _locker;      protected logcollections() {         _logchart = new logginglevelchart();         _locker = new object();     }      public object locker {         { return _locker; }       protected override void insertitem(int index, log4netlog item) {         lock (_locker) {             base.insertitem(index, item);              if (item == null) {                 return;             }             log4netlog temp = item log4netlog;              // updating              if (temp != null) {                  // updating             }         } //unlock      }    } } 

until have used bindingoperations.enablecollectionsynchronization available in .net 4.5. unfortunately have compile code using .net 4.

i want know that, there in catel framework solves kind of problem.

more info:

for application performance main issue, since add many items collection.

update:

using fastobservablecollection solves problem, ui freezes 5-7 sec out of using. guess that, caused dispatcher

i have manually overridden oncollectionchanged:

protected override void oncollectionchanged(notifycollectionchangedeventargs e) {   dispatcherhelper.currentdispatcher.begininvoke(new action(() => base.oncollectionchanged(e)),               dispatcherpriority.contextidle); } 

this not solution. there better way avoid problem?

you might consider using fastobservablecollection in catel:

using (fastcollection.suspendchangenotifications()) {     // todo: add , remove items here } 

as out of using, pass it's change notifications

to around threading issues, can use dispatcherhelper.