What is the number next to the opened file name in

问题:

In visual studio, what does the number next to the file name represent? It is the exact same file.

Here is an example:

It started doing this a few weeks ago and I can't find any information about this. Is there a way to deactivate this feature?

回答1:

For me it's the window number instance whenever I open a new window for that file.

回答2:

Looks like a known VS bug reported here: VS 15.9 Duplicate loads open files on solution reload.