Visual Studio 2015 does not show Unicode last changed charrecter?

Question

I'm using VS 2015 and TFS 2013 update 4.

I was able to see the name of person who last modified/updated and so on above method classes but right now it just show author names which are in Unicode by question mark

What's the problem?

Updated:

Now all of Unicode charecters are gone even in c# files

Answer 1

I found the solution

 Tools ====> options ===> Environment ====> show settings for : CodeLens

and then changed Font type to tahoma.

I check vs on other machines the font on others were sets to calibri but Unicode characters displayed correctly

for more info you can go to

https://msdn.microsoft.com/en-us/library/dn269218.aspx

How do I change the font and color for CodeLens?

A: Go to Tools, Options, Environment, Fonts and Colors.

Answer 2

Please try:
1). Add the author name's language in Control Panel.
2). Open that file with "CSharp Editor with Encoding".
3). Reset VS to the default settings: devenv /ResetSettings

Answer 3

1. Close all instances of Visual Studio.

2. Delete all the cached data in the folder %localappdata%\Microsoft\VisualStudio Services\6.0\

3. Restart Visual Studio and re-open the solution from TFS.