问题
I am facing a strange issue that, getting a message as "Value can not be null. Parameter name is userContext" while clicking on Extensions and updates under tools menu.
Please do let me know what is the workaround for this issue. Thank you.
回答1:
I had the exact same issue. I uninstalled KB4022714 from Start > Windows Update > Advanced Options > View your Update History. The problem went away, but came back after the next Windows Update.
I had to update Windows 10 to build 14393 to actually fix the problem for good.
来源：https://stackoverflow.com/questions/44970220/value-cannot-be-null-parameter-name-usercontext-in-visual-studio-2017