MA.WindowsForms.Numerator_Form.Exit_Click C# (CSharp) Method

        private void Exit_Click(object sender, EventArgs e)
        {
            try
            {

                SumTextBox.Text = Coefficient_Text.Text + (string.IsNullOrWhiteSpace(SumTextBox.Text) ? "" : "*") + SumTextBox.Text;
                All_Functions.Coefficient = Convert.ToDouble(Coefficient_Text.Text);
                Limits.AddToNumeratorDe(All_Functions, Index);
                Limits.AddToNuDeText(SumTextBox.Text, Index);
                Limits.SetVisable(true);
                this.Dispose();
            }
            catch(Exception ex)
            {
                ErrorBox.Text = ex.Message;
            }
        }