if(Process.Start(FileStart.ToString()) == true)
{
//Bloco
};

var WebReq = (HttpWebRequest)WebRequest.Create(Url);
 HttpWebResponse response = (HttpWebResponse)WebReq.GetResponse();

private static void StartService()
    {
        try
        {
            var FileStart = new FileInfo(Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), @"WSOPaf.jar"));
            Process.Start(FileStart.ToString());
        }
        catch(Exception e)
        {
            MessageBox.Show("WSOPaf.jar não foi encontrado", "OK", MessageBoxButtons.OK);
        }
    }