Loop should be simplified by calling Select(dependency => dependency.Key)) (https://rules.sonarsource.com/csharp/RSPEC-3267)

Non-nullable property 'Username' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'GbxMapName' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'AuthorLogin' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'TrackUid' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'path' in 'DirectoryInfo Directory.CreateDirectory(string path)'.

Non-nullable property 'Context' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Dereference of a possibly null reference.