using System.Diagnostics;
using System.IO;

class Program
{
    static void Main()
    {
        var process = new Process();
        process.StartInfo.UseShellExecute = false;
        process.StartInfo.FileName = "echo";
        process.StartInfo.Arguments = "\"Hello World!\"";
        process.Start();
        process.WaitForExit();
    }
}