<pre class="lang: decode:true "> protected void BtnCalculate_Click(object sender, EventArgs e) { double not1, not2, per1, per2, avg; not1 = Convert.ToDouble(TxtNot1.Text); not2 = Convert.ToDouble(TxtNot2.Text); per1 = Convert.ToDouble(TxtPer1.Text); per2 = Convert.ToDouble(TxtPer2.Text); av = (grade1 + grade2 + per1 + per2) / 4; LblOrt.Text = Convert.ToString(avg); if (avg < 50) { LblStatus.Text = "FAILED"; } else if(avg>=50 && avg<70) { LblStatus.Text = "PASS"; } else if (avg >= 70 && avg < 85) { LblStatus.Text = "THANK YOU CERTIFICATE"; } else if (avg >= 85 && avg <= 100) { LblStatus.Text = "CERTIFICATE"; } }</pre>