Hi Brandon,
Thanks for clarifying. I don't know that we have C# examples. I can send you the API model though and it may help. However, if what you need is to create excel files, then why not use our Excel add-in?
Below is a screen shot from our Excel add-in where you can choose which weeks and which projects you'd like to export. There are two main objects named: Time Entry Item and Time Entry Value and these will be the objects you can export.

Please let me know if that helped.
Sagi