I doubt that there are books on how to setup system with your own currency in C#.
But it is perfectly ok to read the standard books of the bitcoin world, ad go from there.
I highly recommend Andreas‘ book „Mastering Bitcoin“ as introduction on the bitcoin Eco-System.
Also you would look into bitcoin.org, the developer section.
And if looking at signing process of tx, search for Ken Shirriff‘s block „Bitcoin the hard way“.
i guess you have done already some reading, so maybe it is a repetition. But then there is the forum here, with lots of Altchinesisch, and a search functionality. The same applies to bitcoin.stackexchange.com.
Hope this helps to get you started