DataSet Creation Dynamically

DataSet Ds = new DataSet();
DataTable Dt = new DataTable();
Ds.Tables.Add(Dt);
Dt.Columns.Add("F_Name");
Dt.Columns.Add("S_Name");
DataRow Dr = Dt.NewRow();
Dt.Rows.Add(Dr);
Dr["F_Name"]="satheesh";
Dr["S_Name"]="mnair";