C# laser distance

Question

İ can't Find this, how can I make lasermeter with c# it is My homework and tomarrow is the last day

Answer 1

A laser distance meter emits a pulse of laser at a target. The pulse then reflects off the target and back to the sending device (in this case, a laser distance meter). This "time of flight" principle is based on the fact that laser light travels at a fairly constant speed through the Earth’s atmosphere.

Calculating Distance
The distance between the meter and target is given by D=ct/2, where c equals the speed of light and t equals the amount of time for the round trip between meter and target.

Answer 2

ı will check it, thanks man