kill process web browser

kill process of  web browsers c#

using System.Diagnostics;

Process[] process_list = Process.GetProcesses();

foreach (Process process in process_list)

{

if (process.ProcessName.ToLower().Contains("firefox".ToLower()))

{

process.Kill();

}

else if (process.ProcessName.ToLower().Contains("chrome".ToLower()))

{

process.Kill();

}

else if (process.ProcessName.ToLower().Contains("iexplore".ToLower()))

{

process.Kill();

}

}