public class PropertiesSourceViewModel : ViewModelBase
{
    private IEnumerable _propertiesSource;
    
    public IEnumerable PropertiesSource
    {
        get { return _propertiesSource; }
        set
        {
            if (_propertiesSource != value)
            {
                _propertiesSource = value;
                OnPropertyChanged("PropertiesSource");
            }
        }
    }

    public PropertiesSourceViewModel()
    {
        this.InitializePropertiesSource();
    }

    private void InitializePropertiesSource()
    {
        ObservableCollection<PropertyGridDefinition> propertiesSource = new ObservableCollection<PropertyGridDefinition>();

        propertiesSource.Add(new PropertyGridDefinition() { Category = "Book Information", Name = "Title", Type = typeof(string), Display = "Title", SortOrder = 5, Value = "Silverlight/WPF Pro", Description = "Book's title" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Book Information", Name = "Edition", Type = typeof(byte), Display = "Edition", SortOrder = 4, Value = 5, Description = "Book's edition", DefaultValue = 5 });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Book Information", Name = "Genre", Type = typeof(string), Display = "Genre", SortOrder = 3, Value = "Software Development", Description = "Book's genre" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Book Information", Name = "Language", Type = typeof(string), Display = "Language", SortOrder = 2, Value = "English", Description = "Book's language" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Book Information", Name = "Author", Type = typeof(string), Display = "Author", SortOrder = 1, Value = "John Doe", Description = "Book's author" });

        propertiesSource.Add(new PropertyGridDefinition() { Category = "Details", Name = "PublishDate", Type = typeof(DateTime), Display = "Publish Date", SortOrder = 5, Value = DateTime.Now, Description = "Book's publish date" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Details", Name = "Publisher", Type = typeof(string), Display = "Publisher", SortOrder = 4, Value = "ABC Publishing", Description = "Book's publisher" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Details", Name = "ISBN", Type = typeof(string), Display = "ISBN", SortOrder = 3, Value = "2343-1667-8763", Description = "Book's ISBN" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Details", Name = "Pages", Type = typeof(short), Display = "Pages", SortOrder = 2, Value = 265, Description = "Total pages of the book" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Details", Name = "Price", Type = typeof(double), Display = "Price", SortOrder = 1, Value = 108.34, StringFormat = "C2", Description = "Book's price" });

        propertiesSource.Add(new PropertyGridDefinition() { Category = "Dimensions", Name = "Width", Type = typeof(short), Display = "Width", SortOrder = 3, Value = 520, Description = "Book's width" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Dimensions", Name = "Height", Type = typeof(short), Display = "Height", SortOrder = 2, Value = 860, Description = "Book's height" });
        propertiesSource.Add(new PropertyGridDefinition() { Category = "Dimensions", Name = "Depth", Type = typeof(short), Display = "Depth", SortOrder = 1, Value = 52, Description = "Book's depth" });

        this.PropertiesSource = propertiesSource;
    }
}