Simple DataSet Sorting in C#

           Simple DataSet Sorting in C# 

            DataSet dsTest = new DataSet();
            DataTable dtSample = new DataTable("SampleTable");
            DataColumn dcName = new DataColumn("Name",typeof(string));
            dtSample.Columns.Add(dcName);
            dtSample.Columns.Add("Age", (typeof(Int32)));
            dtSample.Rows.Add("Lawrence", 25);
            dtSample.Rows.Add("Dinesh", 30);
            dtSample.Rows.Add("Aruna", 24);
            dtSample.Rows.Add("Deb", 35);
            dtSample.Rows.Add("Satish", 42);
            DataView dvSample = new DataView(dtSample);
            dvSample.RowFilter = "Age <> 30";
            dvSample.Sort = "Age Asc";
            dsTest.Tables.Add(dtSample);

Adding One more column with existing DataTable

               object objCheckAmount;
                if (ReceivableDT.Columns.Contains("CheckAmountWithTax") == false)
                {
                    ReceivableDT.Columns.Add("CheckAmountWithTax", typeof(System.Double), "Paid + TaxPaid");
                }
                objCheckAmount = ReceivableDT.Compute("Sum(CheckAmountWithTax)", "Select = 'true' and ReceivableHeaderID='" + ReceivableHeaderID + "'");
                if (objCheckAmount != DBNull.Value)
                {
                    CheckAmount = Convert.ToDouble(objCheckAmount);
                }