I have an existing method with a single parameter in a project which compiles. I added a few new ones to the caller and naturally there's a compile error. I noticed read lines under all the parameters including the original one. Not sure why the original one was included. I hit alt-enter and I was expecting to see one of the suggestions to add the new parameters to the method signature. It wasn't there. There was a suggestion to add new overload. So I chose it and copied the new overload signature on top of the old one and deleted the new overload.
Are there conditions when new parameters addition won't work?