How to properly sign an xml request using digital signature in C#?

Question

Windows

Good afternoon.
During the development of an integration system with a third-party resource, the task arose of sending requests signed by EDS. I have basic knowledge in cryptography, but I really want to understand - the task is very interesting.
Available:
1. Visual Studio 2013
2. C#
3. WSDL document describing interaction with an external system, data formats.
By adding a service reference in the studio, we get all the classes and data types to work with.
It is necessary:
​​1. Understand what types of EDS are
2. Understand what parts an EDS consists of
3. How to properly sign business data using an EDS (a better practical guide)
I really hope for some literature, or practical recommendations or guidelines. Or at least where to dig.
Thanks in advance!

Answer 1

www.cryptopro.ru/blog/2012/05/16/podpis-soobshchen...