How to delete a website in Sharepoint 2013 using CSOM

Steps

Open Visual Studio in your system.
Select Console Application template and give as name.
Add a Microsoft.Client Assembly reference file in right side reference 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;
namespace CSOMCodeSamples
{
class Program
{
static void Main(string[] args)
{
// ClienContext - Get the context for the SharePoint Site
ClientContext clientContext = new ClientContext("http://gauti.sharepoint.com/sites/sp/sp2/");
// Delete the web object
clientContext.Web.DeleteObject();
// Execute the query to the server.
clientContext.ExecuteQuery();
}
}
}