asp.net donut chart telerik databinding

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString);         con.Open(); SqlDataReader myReader = null; SqlCommand myCommand = new SqlCommand("select ( select sum([Budget Estimates 2017-18]) AS [FUNDWISE] from [dbo].[budgetbook-17-18] where Fund = '" + scnum.Text + "' ) , sum([Budget Estimates 2017-18]) as [costwise] from [dbo].[budgetbook-17-18] where Cost_ctr ='" + costcenter.Text + "'", con);          myReader = myCommand.ExecuteReader(); while (myReader.Read()) { string totalfund; string totalcostbudget;              totalfund = (myReader[0].ToString());             totalcostbudget = (myReader[1].ToString()); //Convert.ToDouble(totalcostbudget) / Convert.ToDouble(totalfund) * 360 = a;              a = Convert.ToDouble(totalcostbudget);             b = Convert.ToDouble(totalfund);              piecostbudget = a / b * 100; } Double piefirst = pie100 - piecostbudget; Math.Round(piecostbudget); Math.Round(piefirst);          con.Close(); }