Code Inspection: Redundant 'partial' modifier on type declaration
Rider detects types declared as
partial but consisting of only one part. If no other parts of the class are found in any file within the project, Rider suggests removing the
partial modifier from the class declaration.
Alternatively, you can create more parts of the class by invoking the Extract Members to Partial refactoring on the class name. The refactoring will help you create a new part of the class and move selected members there.