How to get the difference of two datetimepickers in hours in c# visual studio?

How to get the difference of two datetimepickers in hours when the time entered is less than 24hrs?

>Solution :

private void btnClickHere_Click(object sender, EventArgs e)
{
    TimeSpan tpan = EndTime.Value - StartTime.Value;
    int hrs = tpan.Hours + 1;
    txtTextBox.Text = Convert.ToString(hrs);
}