RealtimeAnalysis.FormPRM.textBoxTmsTheta_TextChanged C# (CSharp) Method

        private void textBoxTmsTheta_TextChanged(object sender, EventArgs e)
        {
            TextBox t = sender as TextBox;
            double theta = 0;

            try
            {
                theta = double.Parse(t.Text);
            }
            catch (FormatException fe)
            {
            }
            catch (Exception)
            {
                t.Text = "0";
                //MessageBox.Show("Invalid input!\r\nCheck your input again.", "Caution", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }

            if (theta > double.Parse(textBoxTmsPi.Text))
                textBoxTmsPi.Text = t.Text;
        }
        private void textBoxEmsPi_TextChanged(object sender, EventArgs e)