public partial class MainPage : UserControl{public class Project{public string Title{get;set;}public DateTime DueDate{get;set;}public string Description{get;set;}}private ListItemCollection _projects;public MainPage(){InitializeComponent();ClientContext context = new ClientContext(ApplicationContext.Current.Url); //System.Threading.SynchronizationContext thread = System.Threading.SynchronizationContext.Current; if (thread == null)//thread = new System.Threading.SynchronizationContext();//ClientContext context = new ClientContext("http://localhost");//context.AuthenticationMode = Microsoft.SharePoint.Client.ClientAuthenticationMode.Default;context.Load(context.Web);List Projects = context.Web.Lists.GetByTitle("Tasks");context.Load(Projects);CamlQuery query = new Microsoft.SharePoint.Client.CamlQuery();string camlQueryXml = "<View><Query><Where><Gt>" +"<FieldRef Name='DueDate' />" +"<Value Type='DateTime'>2008-01-1T00:00:00Z</Value>" +"</Gt></Where></Query><ViewFields>" +"<FieldRef Name=\"Title\" /><FieldRef Name=\"Body\" />" +"<FieldRef Name=\"DueDate\" />" +"</ViewFields></View>";query.ViewXml = camlQueryXml;_projects = Projects.GetItems(query);context.Load(_projects);//MessageBox.Show("Test!");//context.ExecuteQuery();//System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(ThreadCallback), context);context.ExecuteQueryAsync(new ClientRequestSucceededEventHandler(OnRequestSucceeded), new ClientRequestFailedEventHandler(OnRequestFailed));}/*private void ThreadCallback(object s){// var context = (ClientContext)s;// context.ExecuteQuery();this.Dispatcher.BeginInvoke(BindData);}*/private void OnRequestFailed(Object sender, ClientRequestFailedEventArgs args){// this is not called on the UI thread //MessageBox.Show("inside OnRequestFailed Method");this.Dispatcher.BeginInvoke(delegate(){MessageBox.Show("inside OnRequestSucceeded Method" + args.StackTrace.ToString() + args.ErrorDetails);});}private void OnRequestSucceeded(Object sender, ClientRequestSucceededEventArgs args) { // this is not called on the UI thread //MessageBox.Show("inside OnRequestSucceeded Method");this.Dispatcher.BeginInvoke(BindData); }private void Failed(ClientRequestFailedEventArgs args){MessageBox.Show("inside OnRequestFailed Method" + args);}private void BindData() { List<Project> projects = new List<Project>();foreach (ListItem li in _projects) { projects.Add(new Project() { Title = li["Title"].ToString(), DueDate = Convert.ToDateTime(li["DueDate"].ToString()), Description = li["Body"].ToString() }); }dataGrid1.ItemsSource = projects; }}