How can i add the row dynamically at an exact postion in a dataset

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C#

ASP.NET

I write a code to add dynamical column and row to a data set but the field is added some where in my data-set so can any one tell how can i resolve this
My code

for (int i = 0; i < Amount.Count; i++)
    {
        DataColumn dc = new DataColumn("Amount");
        local_ds.Tables[0].Columns.Add(dc);
        local_ds.Tables[0].Rows.Add(Amount[i]);
    }

But the field is adding in the next row can any one tell how to achieve this