Get all the users for the specified site group in SharePoint 2010 using Client Object Model

 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint.Client;
 
namespace COM
{
    class Program
    {
        static void Main(string[] args)
        {
            // siteURL is the string that contains the site URL 
            string siteUrl = "http://serverName:50000/sites/Testing";
            // ClientContext object is used to get the context for the SharePoint objects
            ClientContext clientContext = new ClientContext(siteUrl);
            Web web = clientContext.Web;
            Group testingOwnersGroup = web.SiteGroups.GetById(6);
            UserCollection userCollection = testingOwnersGroup.Users;
            clientContext.Load(userCollection,
                users => users.Include(
                    user => user.LoginName,
                    user => user.Id));
            clientContext.ExecuteQuery();
            foreach (User oUser in userCollection)
            {
                Console.WriteLine(oUser.LoginName + "---------" + oUser.Id);
            }            
            Console.ReadLine();
        }
    }
}