Executing any Timer job using code

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics; 

using Microsoft.SharePoint.Administration; 

public ExecuteSharePointJob(string sJobName)
{
    SPSite site = new SPSite("http://localhost");
    //foreach (SPService srv in SPFarm.Local.Services)
    //{
       //foreach (SPJobDefinition job in srv.JobDefinitions)
       foreach (SPJobDefinition job in site.WebApplication.JobDefinitions)
       {
         string jobTitle = job.Title; 

         if (jobTitle == JobName)
         {
           Trace.WriteLine("***************** Start of execution for job");
           job.Execute(new Guid("PassTheContentDBGUID"));
           Trace.WriteLine("***************** End of execution for job");
          }
       }
   //}
}