MainViewModel_Basic.cs

public class MainViewModel : ViewModelBase
{
    private ObservableCollection<Employee> _data;

    public ObservableCollection<Employee> Data
    {
        get => _data;
        set
        {
            if (_data == value)
                return;

            _data = value;
            this.RaisePropertyChanged();
        }
    }
}

MainViewModel_Dynamic.cs

private void RefreshData(object obj)
{
    this.Data = this.GenerateRandomData();
}

static DataView GetSampleView()
{
    DataTable table = new DataTable();
    table.Columns.Add("Weight", typeof(int));
    table.Columns.Add("Name", typeof(string));
    table.Rows.Add(57, "Koko", "Shar Pei", DateTime.Now);
    table.Rows.Add(130, "Fido", "Bullmastiff", DateTime.Now);
    
    return table.DefaultView;
}

MainViewModel_Filtering.cs

public MainViewModel()
{
    _data = new ObservableCollection<Employee>(SampleData.Employees);
    _dataView = new QueryableCollectionView(_data); // Wrap data in a collection view
}

public QueryableCollectionView Data => _dataView;

private void OnFilterData(object obj)
{
    var descriptor = new FilterDescriptor(nameof(Employee.LastName), FilterOperator.StartsWith, "P");
    _dataView.FilterDescriptors.Add(descriptor);
}

MainViewModel_Sorting.cs

private void OnSortData(object obj)
{
    var descriptor = new SortDescriptor() { Member = nameof(Employee.LastName), SortDirection = ListSortDirection.Descending };
    _dataView.SortDescriptors.Add(descriptor);
}