visual-studio - What is the number next to the opened file name in visual studio?

Question

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?

标签： visual-studio

Answer 1

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