I had IObjectInitializer in Gen folder. I tried to copy type IArrayInitializer to IObjectInitializer. ReSharper showed a conflict that such type exists. I pressed continue to ignore it. ReSharper suggested to add IObjectInitializer to an existing file. I chose not to add. ReSharper returned to the same refactoring page and when I tried to press continue asked the same question about adding type to the existing file. I had to cancel the refactoring.