The purpose of my method is to get the currentTime, and set it back for 20 minutes. For what I can see, my method is correct, but the output shows something else.
This
The AddMinutes function returns a DateTime.
DateTime.AddMinutes
Method Returns a new DateTime that adds the specified number of minutes to the value of this instance.
DateTime currentTime = DateTime.Now;
double minuts = -20;
currentTime = currentTime.AddMinutes(minuts);
Console.WriteLine("Nuværende tid: "+currentTime);