private void radButton1_Click(object sender, EventArgs e)
        {
            Rectangular_Intake recintake = new Rectangular_Intake();

            recintake.Show();
            this.Hide();
        }
        private void CircularcalcBtn_Click(object sender, EventArgs e)
        {
            double[] Dp = new double[9] {
                0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0
            };
            double g = 9.81;

            if (Dischargeintaketextbox.Text == "" || Lengthcirculartextbox.Text == "" || canalbedcircletextbox.Text == "")
            {
                MessageBox.Show("you need to fill empty fields", "Message", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
            }
            else
            {
                QC  = Convert.ToDouble(Dischargeintaketextbox.Text);
                LI  = Convert.ToDouble(Lengthcirculartextbox.Text);
                CBL = Convert.ToDouble(canalbedcircletextbox.Text);
            }


            for (int i = 0; i < Dp.Length; i++)
            {
                FI = ((double)0.024402 * LI) / (Math.Pow(Dp[i], (double)1 / 3));
                FT = (double)1.5 + FI;

                QI = (co * Math.PI * Math.Pow(Dp[i], 2) * Math.Sqrt(2 * g * 0.6)) * (double)1 / 4;

                HLI = ((8 * Math.Pow(QI, 2)) * FT) / (Math.Pow(Math.PI, 2) * Math.Pow(Dp[i], 4) * g);

                // HLI=((2*Math.Pow(QC,2))/g*Math.PI*Math.Pow(Dp[i],2))*((double)1.5+(0.024402/(Math.Pow(Dp[i],(double)1/3))));



                BLIP = HLI + CBL;

                if (QI > QC)
                {
                    OutDiameterCircletextbox.Text = Dp[i].ToString();
                    CLIP = BLIP + Dp[i];
                    opcrestcircletextbox.Text  = CLIP.ToString();
                    opbottomcircletextbox.Text = BLIP.ToString();

                    break;
                }
                if (Dp[i] == 1.0)
                {
                    Rectangular_Intake frm = new Rectangular_Intake();
                    frm.Show();

                    this.Hide();
                    MessageBox.Show("YOU BETER TO USE RECTANGULAR TYPE");
                    break;
                }
            }


            weirbodyradButton1.Visible = true;
        }