gistfile1.cs

/// <summary>
/// Executes the URI and loads the DataServiceCollection with the results of the request
/// </summary>
/// <typeparam name="TEntity">The entity type for the DataServiceCollection</typeparam>
/// <param name="context">The DataServiceContext instance that will be used 
                   to query the DataService</param>
/// <param name="collection">The DataServiceCollection<paramref name="TEntity"/> 
          which will be loaded the the results of this query</param>
/// <param name="requestUri">The URI to query for data from the DataService</param>
public static void LoadDataServiceCollection<TEntity>(this DataServiceContext context, 
                                              DataServiceCollection<TEntity> collection, 
 						Uri requestUri) {
context.BeginExecute<TEntity>(requestUri,
 (asResult) =>{
  Application.Current.RootVisual.Dispatcher.BeginInvoke(() =>  {
     try {
          var dsCollection = asResult.AsyncState as DataServiceCollection<TEntity>;
          var queryResponse = context.EndExecute<TEntity>(asResult) 
                                 as QueryOperationResponse<TEntity>;
           dsCollection.Add(resultEntity);
         }
         else {
            dsCollection.Load(queryResponse);
          }
         }
         catch (Exception) {
          throw;
         }
        finally {

          }
         }
        );
       }, collection);
    }