How to compare time from current time in C#

Question

HI,

I am making a payroll software where i want to add a function for attendance where when a employee Login his time will save in Database but if Employee is 20 Mint. Late from their shift time it will automatic create Half Day. I added this code there.

 private void btntimecheck_Click(object sender, EventArgs e)

        {

            if (System.DateTime.Now.Hour >= 10)

            {

                lbltimecheck.Text = "On Time";

            }

            else

            {

                

                    lbltimecheck.Text = "Late";

                

            }

        }

in this code i can  not compare minutes. like 10:20 i can compare only hours.

so please any one know its solution please give me that code.