Asynchronous Processing

http://msdn.microsoft.com/en-us/library/office/ee857094(v=office.14).aspx

using System;
using System.Collections.Generic;
using Microsoft.SharePoint.Client;

class Program
{
    static void Main(string[] args)
    {
        AsynchronousAccess asynchronousAccess = new AsynchronousAccess();
        asynchronousAccess.Run();
        Console.WriteLine("Before exiting Main");
        Console.WriteLine();
        Console.WriteLine("In a real application, the application can");
        Console.WriteLine("continue to be responsive to the user.");
        Console.WriteLine();
        Console.ReadKey();
    }
}

class AsynchronousAccess
{
    delegate void AsynchronousDelegate();

    public void Run()
    {
        Console.WriteLine("About to start a query that will take a long time.");
        Console.WriteLine();
        ClientContext clientContext =
            new ClientContext("http://intranet.contoso.com");
        ListCollection lists = clientContext.Web.Lists;
        IEnumerable newListCollection = clientContext.LoadQuery(
            lists.Include(
                list => list.Title));
        AsynchronousDelegate executeQueryAsynchronously =
            new AsynchronousDelegate(clientContext.ExecuteQuery);
        executeQueryAsynchronously.BeginInvoke(
            arg =>
            {
                clientContext.ExecuteQuery();
                Console.WriteLine("Long running query completed.");
                foreach (List list in newListCollection)
                    Console.WriteLine("Title: {0}", list.Title);
            }, null);
    }
}

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