I actually was doing some games of a guide using unity but more using scripts in c# to run the game, i learn some basic things of the lenguage but i'm new in this world of programing. What i want is to know if there is somenthing that help me practice more or help me improve the poor knowledge that i have about programing in c#. I would appreciate any help.

I found MSDN to be an invaluable resource when it comes to C#.
They have a well thought-out programming guide and list of simple tutorial programs, from Hello World to database handling.

MS developers network (has full standard lib documentation as well): https://msdn.microsoft.com/en-us/

Although Unity scripts run on Mono (.NET is the MS virtual machine and standard lib implementation), most of what you read here (close to everything) works the exact same way.

Check out Codingame (https://www.codingame.com/home), there are game related problems (ranging from simple to very difficult) and you can use them to learn/improve your C# skills. Combine those exercises with standard MSDN materials, dotnetperls (http://www.dotnetperls.com/) for general C#, and I think you will get a good foundation.

Get a book aimed at a beginner/intermidate user on the language and set aside 30 minutes daily. Start at the beginning and just work your way through at your own pace.

In no particular order.

http://www.learncs.org

http://www.homeandlearn.co.uk/csharp/csharp.html

http://www.blackwasp.co.uk/Tutorials.aspx

http://www.csharp-station.com/tutorial.aspx

https://en.wikibooks.org/wiki/C_Sharp_Programming

http://www.introprogramming.info/english-intro-csharp-book/read-online/

http://www.csharpcourse.com

http://www.techotopia.com/index.php/C_Sharp_Essentials

http://www.c-sharpcorner.com/Beginners/

data structures

http://www.brpreiss.com/books/opus6/

threading

http://www.albahari.com/threading/

design patterns

http://www.oodesign.com

In my opinion this is a perfect "Crash course" start.

http://rbwhitaker.wikidot.com/c-sharp-tutorials

it has good explanations right from the basics upto everything you need for a XNA or monogame if your interested..