Menu: Tools -> Options -> Projects And Solutions -> General
When you rename, say, a Class File from "Class1" to "bubba" for example:
You receive this prompt:
Which, in this simple case, results in the renaming of the class and the file:
If you find yourself doing this a lot then you can get rid of the prompt to rename by going to Tools -> Options -> Projects And Solutions -> General then remove the check from the "Prompt for symbolic renaming when renaming files" option:
From now on when you do your renaming the prompt will not appear and your symbols will be renamed automatically.