How to Retrive All Groups in SharePoint Programmatically

Steps

Open Visual Studio in your system
Select Console Applciation template and give as name .
Add a Microsoft.Cleint Assembly refrence file in right side refrence tab in visual studio.
Replace Program.cs with the source code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
using System.IO;
namespace CSOMCodeSamples
{
class Program
{
static void Main(string[] args)
{
// ClientContext - Get the context for the SharePoint Site
ClientContext clientContext = new ClientContext("http://gauti.sharepoint/sites/CSOM/");
// Get the SharePoint web
Web web = clientContext.Web;
// Get all the site groups
GroupCollection groupColl = web.SiteGroups;
clientContext.Load(groupColl);
// Execute the query to the server
clientContext.ExecuteQuery();
// Loop through all the groups
foreach (Group group in groupColl)
{
// Display the group name
Console.WriteLine(group.Title);
}
Console.ReadLine();
}
}
}