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;
            GroupCollection groupColl = web.SiteGroups;
            clientContext.Load(groupColl,
                groups=>groups.Include(
                group=>group.Title,
                group=>group.Id));
            clientContext.ExecuteQuery();
            foreach (Group siteGroup in groupColl)
            {
                Console.WriteLine(siteGroup.Title + "-------" + siteGroup.Id);                
            }
            Console.ReadLine();
        }
    }
}