The variable 'e' is declared but never used

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

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

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

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

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

Nullability of reference types in type of parameter 'sender' of 'void StatefulComponentBase.OnLocationChanged(object sender, LocationChangedEventArgs e)' doesn't match the target delegate 'EventHandler<LocationChangedEventArgs>' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'sender' of 'void StatefulComponentBase.OnLocationChanged(object sender, LocationChangedEventArgs e)' doesn't match the target delegate 'EventHandler<LocationChangedEventArgs>' (possibly because of nullability attributes).

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.