A C# WPF .NET 4.0 "DataGrid" with Persistent Controls in Cells

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace PersistDataGrid
{
    /// <summary>
    /// Interaction logic for Header.xaml
    /// </summary>

    public enum SortType : byte
    {
        Ascending,
        Descending,
        NotOrdered
    }

    public delegate SortType HeaderClickedDelegate(Header header, SortType SortType);

    public partial class Header : UserControl
    {
        private HeaderClickedDelegate HeadClickDel;
            
        private SortType CurrentSortType = SortType.NotOrdered;
 
        public Header(string title, HeaderClickedDelegate HeadClickDel)
        {
            InitializeComponent();
            Title.Content = title;
            this.HeadClickDel = HeadClickDel;
        }
        private PathGeometry GetArrowDrawing(bool Up)
        {
            PathFigure ArrowFigure = new PathFigure();
            ArrowFigure.StartPoint = (Up) ? new Point(0, 5) : new Point(0.0, 1.0);

            List<Point> PointList = new List<Point>();

            if (Up)
            {
                PointList.Add(new Point(3.5, 1.0));
                PointList.Add(new Point(7.0, 5.0));
            }
            else
            {
                PointList.Add(new Point(3.5, 5.0));
                PointList.Add(new Point(7.0, 1.0));
            }

            ArrowFigure.Segments.Add(new PolyLineSegment(PointList, true));

            PathGeometry ArrowGeometry = new PathGeometry();
            ArrowGeometry.Figures.Add(ArrowFigure);

            return ArrowGeometry;
        }
        private void UpdateSortArrow()
        {
            switch (CurrentSortType)
            {
                case SortType.NotOrdered:
                    Arrow.Data = null;
                    break;
                case SortType.Ascending:
                    Arrow.Data = GetArrowDrawing(true);
                    break;
                case SortType.Descending:
                    Arrow.Data = GetArrowDrawing(false);
                    break;
            }
        }

        private void UserControl_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            CurrentSortType = HeadClickDel(this, CurrentSortType);
            UpdateSortArrow();
        }

        public void ResetSortType()
        {
            if (CurrentSortType != SortType.NotOrdered)
            {
                CurrentSortType = SortType.NotOrdered;
                UpdateSortArrow();
            }
        }

        private void UserControl_GotMouseCapture(object sender, MouseEventArgs e)
        {
            HeaderBorder.CaptureMouse();
        }
    }
}