Participate in online open source .NET projects

Participate in online open source .NET projects
https://dotnetfoundation.org/

Online learning courses

http://shawacademy.com/
https://www.udemy.com/
https://www.edx.org/
https://www.coursera.org/
http://htmldog.com/
https://www.howdesignuniversity.com/
http://www.daveconservatoire.org/
https://www.khanacademy.org/

Sites with coding challenges

Here is the list of sites that provide coding challenges in various languages:
https://www.codewars.com/
https://www.codingame.com/start
http://codegolf.stackexchange.com/
topcoder

RePost: UI automated test

Very interesting analysis of things to consider before jumping into UI automated testing process.

https://www.simple-talk.com/dotnet/asp.net/getting-started-with-ui-test-automation/

REPOST: Implementing SSO in Microsoft stack

https://www.simple-talk.com/dotnet/asp.net/introducing-single-sign-on-to-an-existing-asp.net-mvc-application/

REPOST: Freelancing tips

Interesting:
http://www.sitepoint.com/4-things-i-wish-id-been-told-at-the-start-of-my-freelance-career/?utm_medium=email&utm_campaign=SitePoint%20Front-end%20Newsletter%20%20April%207%202016&utm_content=SitePoint%20Front-end%20Newsletter%20%20April%207%202016+CID_ca5184f2e981114a7d1dcf4394979413&utm_source=CampaignMonitor%20SitePoint&utm_term=4%20Things%20I%20Wish%20Id%20Been%20Told%20at%20the%20Start%20of%20My%20Freelance%20Career

REPOST: .NET test yourself for technical interview

.NET test yourself for technical interview

http://www.webdevelopmenthelp.net/asp-net-mvc-online-test