i have problem with may code can u help me?

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C#

this is my code and i have error at Asteel_total
which one know how can fix it?
thank U

 double Dmid,Dcorner,NoBarA3,NoBarA2,rebNom,Asteel_Total = 0;
 NoBarA3 = 6;
 NoBarA2 = 3;
 double h = double.Parse(txt_B_column.Text, System.Globalization.NumberStyles.Float);
 double Cover = double.Parse(txt_Cover.Text, System.Globalization.NumberStyles.Float);
double b = double.Parse(txt_B_column.Text, System.Globalization.NumberStyles.Float);


 Dmid = double.Parse(txt_BarSize.Text, System.Globalization.NumberStyles.Float);
 Dcorner = double.Parse(txt_Corner_Bar.Text, System.Globalization.NumberStyles.Float);

 DataRow row;
 DataTable Axis2 = GetDt("Axis2");

 dataSet = new DataSet();
 // Add the new DataTable to the DataSet.
 dataSet.Tables.Add(Axis2);
 for (int i = 1; i < NoBarA3; i++)
 {

     row = Axis2.NewRow();
     row["id"] = i;
     row["ds"] = ((h - 2 * Cover) / (NoBarA3 - 1)) * (i - 1) + Cover;
     if (i == 1 || i == (NoBarA2 - 2))
     {
         rebNom = NoBarA2 - 2;
         row["As"] = rebNom * Math.PI * Math.Pow(Dmid, 2) * 0.25 + 2 * Math.PI * Math.Pow(Dcorner, 2) * 0.25;
     }
     else
     {
         row["As"] = 2 * Math.PI * Math.Pow(Dmid, 2) * 0.25;
     }
     row["SteelMaterial_ID"] = cmb_Steel_DSC.SelectedItem;

 }

 DataTable Axis3 = GetDt("Axis3");
 dataSet = new DataSet();
 // Add the new DataTable to the DataSet.
 dataSet.Tables.Add(Axis3);
 for (int i = 1; i < NoBarA2; i++)
 {
     row = Axis3.NewRow();
     row["id"] = i;
     row["ds"] = ((b - 2 * Cover) / (NoBarA2 - 1)) * (i - 1) + Cover;
     if (i == 1 || i == NoBarA2)
     {
         rebNom = NoBarA3 - 2;
         row["As"] = rebNom * Math.PI * Math.Pow(Dmid, 2) * 0.25 + 2 * Math.PI * Math.Pow(Dcorner, 2) * 0.25;
     }
     else
     {
         row["As"] = 2 * Math.PI * Math.Pow(Dmid, 2) * 0.25;
     }
     row["SteelMaterial_ID"] = cmb_Steel_DSC.SelectedItem;
 }

 //Axis3.Rows[1][1].ToString();
 //dgv_DS_C.DataSource = dataSet;
 for (int i = 1; i < NoBarA3; i++)
 {
     Asteel_Total = Asteel_Total + double.Parse(Axis3.Rows[i][1].ToString(), System.Globalization.NumberStyles.Float);

 }

and this is error message
An unhandled exception of type 'System.IndexOutOfRangeException' occurred in System.Data.dll

Additional information: There is no row at position 1.