internal void SetField <T>(ref DirtyList <T>?field, IList <T>?value, [CallerMemberName] string?propertyName = null)
{
if (!ReferenceEquals(field, value))
{
field = value != null ? new DirtyList <T>(value) : null;
OnPropertyChanged(propertyName);
}
}
internal IList <T> GetField <T>(ref DirtyList <T>?field) => field ??= new DirtyList <T>();