How to commit changes in WPF DataGrid to ObservableCollection Source

Question

I have DataGrid Conrol

<DataGrid Name="dataGrid" ItemsSource="{Binding Faculties}">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Название" Width="*" Binding="{Binding Title, UpdateSourceTrigger=LostFocus, Mode=TwoWay}"/>
    </DataGrid.Columns>
</DataGrid>

and View Model

private ObservableCollection<Faculty> faculties = new ObservableCollection<Faculty>();
public ObservableCollection<Faculty> Faculties
{
    get { return faculties; }
    set 
    { 
        faculties = value;
        RaisePropertyChanged("Faculties");
    }
}

Faculty class:

public class Faculty
{
    public string Title { get; set; }
}

How to save changes in DataGrid to my collection? Two-Way Binding does not help

Answer 1

Unfortunately your Faculty class should implement the INotifyPropertyChanged interface to make it work. (The ObservableCollection will only force updates if the collection itself changes - elements are added or removed - and not when properties of elements in the collection change.)