private void Operations_Calcu(object sender, EventArgs e)
        {
            //Excute the operator sign's from buttons
            Guna.UI2.WinForms.Guna2GradientButton opeer = (Guna.UI2.WinForms.Guna2GradientButton)sender;

            //check if the textbox empty or not
            if (Result_TextBox.Text == string.Empty)
            {
                MessageBox.Show("No numbers found", "No numbers founds", MessageBoxButtons.OK, MessageBoxIcon.Information);
                Result_TextBox.Focus();
            }
            else
            {
                //Parse the numbers and do some operations
                operations = opeer.Text;
                //Generate the first number
                Result_value        = double.Parse(Result_TextBox.Text);
                Operator_label.Text = Result_value.ToString() + operations;
                Result_TextBox.Text = "";
            }
        }
        private void guna2GradientButton15_Click(object sender, EventArgs e)
        {
            //Equal buttons
            if (Result_TextBox.Text == string.Empty)
            {
                MessageBox.Show("No numbers found", "No numbers founds", MessageBoxButtons.OK, MessageBoxIcon.Information);
                Result_TextBox.Focus();
            }
            else   // Generate the second numbers and define the operations
            {
                double value_two;

                value_two = double.Parse(Result_TextBox.Text);

                switch (operations)
                {
                case "+":
                    Result_TextBox.Text = (Result_value + value_two).ToString();
                    break;

                case "-":
                    Result_TextBox.Text = (Result_value - value_two).ToString();
                    break;

                case "X":
                    Result_TextBox.Text = (Result_value * value_two).ToString();
                    break;

                case "/":
                    Result_TextBox.Text = (Result_value / value_two).ToString();
                    break;

                default:
                    break;
                }
            }
        }