In IntelliJ IDEA there was a nice feature.
When you have duplicate code in a bunch of methods in a class and apply, for example, Extract Method refactoring to one of that pieces, it automatically had founded and replaced all occurencies of the same code.
R# does not.
It would be a very nice feature to have.
that would be really nice. The same kind of functionality already is present in the introduce field refactoring, so maybe it's not too difficulkt to provide a similar "replace in all occurences" flag in the method extract refactoring.