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The target framework 'net5.0-windows' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Possible null reference return.

Dereference of a possibly null reference.

Nullability of reference types in type of 'event PropertyChangedEventHandler FilterWindowView.PropertyChanged' doesn't match implicitly implemented member 'event PropertyChangedEventHandler? INotifyPropertyChanged.PropertyChanged'.

Nullability of reference types in type of 'event PropertyChangedEventHandler SearchParameterViewModel.PropertyChanged' doesn't match implicitly implemented member 'event PropertyChangedEventHandler? INotifyPropertyChanged.PropertyChanged'.

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

Possible null reference return.

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

Possible null reference return.