datetime.addminutes

[Crash893]

I cant seem to figure this one out

I have a trackbar that i need to slide back and forth to adjust the time of a datetime object.

but even thought I have a Int in the value to add it still doesn't seem to do anything


can anyone see where I'm messing up?

DateTime CDeadline = new DateTime();
        private void Track_Current_Scroll(object sender, EventArgs e)
        {
            // MessageBox.Show(Convert.ToString(Track_Current.Value * 10));  <--- displays the correct value
            CDeadline.AddMinutes(Track_Current.Value * 10); <---- does not work
            CDeadline.AddMinutes(1234); <--- static test still doesnt work
 
            lbl_Current_time.Text = CDeadline.ToString("HH:mm");
            
        }