How can I pass the result of the linq to a textbox?

Code:
string search = txtSearchPO.Text;

            IPSBLL.TransactionInfo dbInfo = new IPSBLL.TransactionInfo();
            var q = from info in dbInfo.GetTransactionInfo()
                    where info.PONumber == search
                    select info;

            txtPONumber.Text = q;
I need to access the column data something like this:

Code:
DataTable.Rows[index].columnName
How can I do that in LINQ?