I have added a general tutorial on collision detection in MonoGame. It starts with the basics of testing for bounding box collision detection. It then moves to pixel based collision detection followed by collision detection of rotated objects. I will be doing another tutorial that covers alternate collision detection like multiple bounding boxes, bounding circles and a full explanation of per pixel collision detection on rotated animated sprites. You can find the link to the tutorial on the MonoGame Tutorials page of the site or you can use this direct link.