LauncherForm.cs

    public partial class LauncherForm : Form
    {
        public LauncherForm()
        {
            InitializeComponent();
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            string accessToken = "{"+
    "\"last_refresh\": \"0\","+
    "\"expiration_timestamp\": \"0\","+
    "\"permissions\": \"email,public_profile\","+
    "\"user_id\": \"" + txtFacebookId.Text.Trim() + "\","+
    "\"access_token\": \"" + txtAccessToken.Text.Trim() + "\"" +
  "}";
            System.Diagnostics.Process.Start("xxx.exe", "/access_token " + System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(accessToken)) + " /pn fbpipe");
        }

        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            System.Diagnostics.Process.Start(lnkAccessToken.Text);
        }
    }