Using Selected Items in WPF to Filter Buses and put the Filtered Buses in a ComboBox

public Time SelectedTime
 {
  get => _selectedTime;
  set
  {
    _selectedTime = value;
    matchingBuses = MatchingBuses()
    OnPropertyChanged(nameof(FilteredBuses));
  }
}          

public Time SelectedTime
 {
  get => _selectedTime;
  set
  {
    _selectedTime = value;
    matchingBuses = MatchingBuses()
    OnPropertyChanged(nameof(FilteredBuses));
  }
}          

- public IEnumerable<Bus> FilteredBuses => MatchingBuses;
+ public IEnumerable<Bus> FilteredBuses => matchingBuses;

- public IEnumerable<Bus> FilteredBuses => MatchingBuses;
+ public IEnumerable<Bus> FilteredBuses => matchingBuses;

DisplayMemberPath="Departure"
SelectedValuePath="Departure"
SelectedValue="{Binding SelectedTime, Mode=TwoWay}"

DisplayMemberPath="Departure"
SelectedValuePath="Departure"
SelectedValue="{Binding SelectedTime, Mode=TwoWay}"