问题
I downloaded Visual studio 2015 Community Edition and installed it using the guidance in this post How to install VS2015 Community Edition offline
It installed and seemed to be fine but soon after the application said I now required a license code. Considering this is the Community Edition installed on a home PC why is it asking for a key code? It is definitely the Community Edition because the installed item says so. What is wrong with my install?
回答1:
What you probably are seeing is the request to register your version with Microsoft, which is required within 30 days of first usage.
For this you need only some email-address of yours that can be used to create a Microsoft account. You even can register more than one installations with the same account.
You can check the status of your license via Help/About Visual Studio
when you click on check for an updated license you are asked for your Microsoft account.
来源：https://stackoverflow.com/questions/33585447/visual-studio-2015-community-edition-license