When I press F12 (Go To Definition) in Visual Studio 2015 I get this error message:
One or more errors occured
I already tried:
This is an issue with C# and tabs instead of spaces when attempting to hit the metadata of an external assembly. It may be related the inferred position of the insertion point.
There are a couple of Connect tickets here and here and a Github issue on this. There is also a discussion here.
This issue is addressed in Update 1 so please install!
The options dialog remembers the last page and remains there on subsequent opens. I have a keyboard shortcut to open the options pane quickly (Alt + o). I am temporarily changing to spaces, going to definition and then reverting to tabs before making any code changes. This workflow isn't pretty but neither were the 3.0 Nuget issues in VS2015 either (Nuget 3 has improved to date).