SuperPutty.dlgEditSession.radioButtonCygterm_CheckedChanged C# (CSharp) Method

        private void radioButtonCygterm_CheckedChanged(object sender, EventArgs e)
        {
            string host = this.textBoxHostname.Text;
            bool isLocalShell = this.radioButtonCygterm.Checked || this.radioButtonMintty.Checked;
            this.textBoxPort.Enabled = !isLocalShell;
            this.textBoxExtraArgs.Enabled = !isLocalShell;
            this.textBoxUsername.Enabled = !isLocalShell;

            if (isLocalShell)
            {
                if (String.IsNullOrEmpty(host) || !host.StartsWith(CygtermStartInfo.LocalHost))
                {
                    OldHostname = this.textBoxHostname.Text;
                    this.textBoxHostname.Text = CygtermStartInfo.LocalHost;
                }
            }

        }