Invariant stroke thickness of Path regardless of the scale

Question

We are using wpf to develop a cad like application where drawings placed on the canvas using the Path object. I just ran into a slight issue that whenver i scale/zoom my canvas, all the elements in the canvas get scaled and this is the behaviour i wanted but this also increases the stroke thickness of the Path.

Is there a way by which i increase/scale/zoom the objects but still i maintain the same stroke thickness of the path.

Any help in this regard will be very useful for me.