I would recommend using the pluralsight learning resources on https://www.pluralsight.com/.

It is a paid for site but covers a lot of technology, including c#. They offer a trial period - 10 hours of streaming for free.

However, if you sign up to the Microsoft Dev Essential site (free) then you can get a unlimited 3 month trial for pluralsight. They usually charge around $29.00 dollars a month.