How to get the Time Difference in C# .net

 DateTime startTime, endTime;
            startTime = Convert.ToDateTime("9:24 AM");
            endTime = Convert.ToDateTime("10:24 AM");
            var timeDiff = new TimeSpan(endTime.Ticks - startTime.Ticks);
            MessageBox.Show("Time difference in hours is " + timeDiff.Hours);