How to notify EntityChangeSet in DomainServices Silverlight

See more:

C#

WPF

Silverlight

C#4.0

First at all, my English is weak, hope you can understad! I'm developing a silverlight application using DomainServices(DomainContext Class - Namespace: System.ServiceModel.DomainServices.Client) to retrieve and update data. I have some Properties:

DomainContextVBHS _Service = new DomainContextVBHS();
public int AddedEntitiesCount
{
    get{ return _Service.EntityContainer.GetChanges().AddedEntities.Count; }
}

public int ModifiedEntitiesCount
{
    get{ return _Service.EntityContainer.GetChanges().ModifiedEntities.Count; }
}
public int RemovedEntitiesCount
{
    get{ return _Service.EntityContainer.GetChanges().RemovedEntities.Count; }
}

How can i notify them on UI when _Service get any changes(insert, update, delete)?