BuildTools.BuildTools.undoBT_Click C# (CSharp) Method

        private void undoBT_Click(object sender, EventArgs e)
        {
            new Thread(delegate () {
                _googleAnalytics.SendEvent("Log", "Undo Button");
            }).Start();

            outputTB.Text = _lastLog + outputTB.Text;
            _lastLog = "";
            undoBT.Visible = false;
        }