DataTable Select by exact DateTime

I have a DataTable xData which has a DateTime column with millisecond accuracy, I need to extract the rows which match an exact time with milliseconds but cannot get the syntax correct. I've tried DateTime dt = timeStampList[i]; string str = dt.ToString("yyyy-MM-dd HH:mm:ss.fff"); DataRow[] result = xData.Select("TimeStamp2 = " + str); foreach (DataRow row in result) { Console.WriteLine("{0}, {1}"