private void splitContainer1_Panel1_Paint(object sender, PaintEventArgs e)
        {
            FormMainConversions formMainConversions = new FormMainConversions();

            formMainConversions.ShowDialog();
        }
        private void btn_open_Click(object sender, EventArgs e)
        {
            FormMainConversions formMainConversions = new FormMainConversions();

            formMainConversions.ShowDialog();
        }