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I have a solution with a few projects. Remove unnecessary usings is working in all projects except for one.
Why does the Remove unnecessary usings command not work in some projects?
Edit - As you can see in the Before image there is no Remove unnecessary usings command and if you try to right-click in the file, then Organize usings > Remove unnecessary usings does nothing. After setting the project build warning level to 4 the Remove unnecessary usings command appears and works.
Before:
After:
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First is putting your cursor on one of the grayed out lines and clicking the light bulb, then clicking Remove Unnecessary Usings. (NOTE: The shortcut key for this is CTRL-.) When the action is executed the references will be cleaned up.
Needing to set the Warning Level to 4 for code analyzers to fire is a Roslyn known issue.
Additionally, check your projects' Code Analysis rules (project properties > Code Analysis > Open). We had CS8019 and IDE0005 disabled, which prevents the code fix from being offered and the unused using(s) from being highlighted, respectively.
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