I've been trying to install an extension for visual Studio Community 2015 using a .vsix file. When I double-click it, nothing happens. I've also tried opening it with "Visual Studio Version Selector" using "Open With..", but even then nothing happens.
After some searching, I found that the .vsix file can also be installed using Developer Command Prompt for VS2015, but even that didn't help.
Initially I thought that maybe the extension is faulty, but the same thing happens if try to install any other .vsix extension.
Note: The extensions that I have tried to installing are UnrealVS.vsix and Roslyn_SDK.vsix
I don't know why it happened at the first place. But the problem was fixed after I reinstalled visual studio 2015 community.
Thank you all for your suggestions.