Telerik RadPropertyGrid

<UserControl x:Class="SilverlightCreate.TelerikGrid"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">
        <telerik:RadPropertyGrid x:Name="grid1" Margin="155,0,0,0" AutoGeneratingPropertyDefinition="grid1_AutoGeneratingPropertyDefinition" LabelColumnWidth="100">
        </telerik:RadPropertyGrid>

    </Grid>
</UserControl>

public partial class TelerikGrid : UserControl
    {
        public TelerikGrid()
        {
            InitializeComponent();

            grid1.SortAndGroupButtonsVisibility = Visibility.Collapsed;
            grid1.SearchBoxVisibility = Visibility.Collapsed;
            grid1.DescriptionPanelVisibility = Visibility.Collapsed;

            this.grid1.Item = new Employee()
            {
                FirstName = "Sarah",
                LastName = "Blake",
                Occupation = "Supplied Manager",
                StartingDate = DateTime.Today,
                IsMarried = true,
                sex = Sexs.男
            };

            

        }


        private void grid1_AutoGeneratingPropertyDefinition(object sender, Telerik.Windows.Controls.Data.PropertyGrid.AutoGeneratingPropertyDefinitionEventArgs e)
        {
            e.PropertyDefinition.GroupName = "Properties";
        }


    }


    public class Employee
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Occupation { get; set; }
        public DateTime StartingDate { get; set; }
        public bool IsMarried { get; set; }
        public Sexs sex { get; set; }

    }

    public enum Sexs
    { 
        男,
        女
    }