I have a link here you can use to see how you can use trig in order to move items in wave patterns or circles. The tutorial is for Python, but the ideas are all transferable to any programming language. There is also a GitHub link to a solution that demonstrates these in C#.
These instructions are for Python, but the concepts are transferable to C#.
https://github.com/AldworthClass/Trig-for-Animating-Waves-and-Circles