The "--output" option isn't supported when building a solution. Specifying a solution-level output path results in all projects copying outputs to the same directory, which can lead to inconsistent builds.

Nullability of reference types in type of 'event EventHandler<Tuple<int, int, LibraryType>> ManualLibrary.LoadingProgress' doesn't match implicitly implemented member 'event EventHandler<Tuple<int, int, LibraryType>>? ILibrary.LoadingProgress'.

Nullability of reference types in type of 'event EventHandler<Tuple<int, int, LibraryType>> XboxLibrary.LoadingProgress' doesn't match implicitly implemented member 'event EventHandler<Tuple<int, int, LibraryType>>? ILibrary.LoadingProgress'.

Non-nullable field '_epicPath' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable field '_steamPath' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable field '_ubiPath' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable property 'displayName' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'identityName' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.