Visual Studio 2015 Register Product and Evaluation

Visual Studio 2015 Register Product and Evaluation

Visual Studio 2015 Sign-in Experience & Scenarios
https://blogs.msdn.microsoft.com/vsnetsetup/2016/03/30/visual-studio-sign-in-experience-scenarios/

License: 30 day trial (for evaluation purposes only)
sign into Visual Studio with a Microsoft account
License: Trial extension (for evaluation purposes only)

How to: Upgrade from a Trial Edition of Visual Studio
https://msdn.microsoft.com/en-us/library/gg442061.aspx
for a total of 90 days.

sign into Visual Studio with an organizational account, that is associated with an MSDN subscription or a Visual Studio Online subscription.
License: MSDN Subscription

To unlock Visual Studio with a product key
License: Product key applied

Visual Studio 2015 Community is Free

Microsoft Visual Studio Community 2015
https://www.microsoft.com/zh-tw/download/details.aspx?id=48146
Visual Studio Community
https://www.visualstudio.com/zh-hans/vs/community/