Silverlight DataGrid with Dynamic Multiple Row Columns in Header

using System;
using System.Collections.Generic;
using System.Linq;

namespace DynamicMutipleRowHeaderSilverlighGrid
{
    public class DynamicHeaders
    {
        List<DynamicHeader> Headers;
        int _HeaderRows;
        int _HeaderCols;

        public DynamicHeaders(String Header)
        {
            Headers = new List<DynamicHeader>();
            String[] HeaderParts = Header.Split(',');
            foreach (String tmpHeaderPart in HeaderParts)
                Headers.Add(new DynamicHeader(tmpHeaderPart));

            _HeaderCols = Headers.Count;
            _HeaderRows = Headers.Max(H => H.HeaderDepth);
            ParseHeader();
        }

        public List<RowHeader> ParseHeader()
        {
            //Creating an Array with the headings
            Array HeaderCells = Array.CreateInstance(typeof(DynamicHeaderCell), _HeaderRows, _HeaderCols);
            for (int i = 0; i < Headers.Count; i++)
            {
                DynamicHeader tmpDynamicHeader = Headers[i];
                for (int j = 0; j < tmpDynamicHeader.Headers.Length; j++)
                {
                    String HeaderString = tmpDynamicHeader.Headers[j];
                    HeaderCells.SetValue(new DynamicHeaderCell(HeaderString), j, i);
                }
            }

            //Marge the columns
            for (int i = 0; i < _HeaderRows; i++)
            {
                for (int j = 0; j < _HeaderCols; j++)
                {
                    DynamicHeaderCell HeaderCell1 = (DynamicHeaderCell)HeaderCells.GetValue(i, j);
                    if (HeaderCell1 == null)
                        continue;
                    for (int k = j + 1; k < _HeaderCols; k++)
                    {
                        DynamicHeaderCell HeaderCell2 = (DynamicHeaderCell)HeaderCells.GetValue(i, k);
                        if (HeaderCell2 == null)
                            continue;
                        if (HeaderCell1.Header.Equals(HeaderCell2.Header))
                        {
                            HeaderCell1.ColSpan++;
                            HeaderCells.SetValue(null, i, k);
                        }
                    }
                }
            }

            //Marge the Rows
            for (int j = 0; j < _HeaderCols; j++)
            {
                for (int i = 0; i < _HeaderRows; i++)
                {
                    DynamicHeaderCell HeaderCell1 = (DynamicHeaderCell)HeaderCells.GetValue(i, j);
                    if (HeaderCell1 == null)
                        continue;

                    for (int k = i + 1; k < _HeaderRows; k++)
                    {
                        DynamicHeaderCell HeaderCell2 = (DynamicHeaderCell)HeaderCells.GetValue(k, j);
                        if (HeaderCell2 == null)
                        {
                            HeaderCell1.RowSpan++;
                            HeaderCells.SetValue(null, k, j);
                        }
                        else
                        {
                            break;
                        }
                    }
                }
            }

            //Creating an Arraylist. 
            //This will contain List of DynamicHeaderCell for each row
            //GridView will render these
            List<RowHeader> HeaderRows = new List<RowHeader>();
            for (int i = 0; i < _HeaderRows; i++)
            {
                RowHeader RowHeaderCell = new RowHeader();
                for (int j = 0; j < _HeaderCols; j++)
                {
                    DynamicHeaderCell HeaderCell = (DynamicHeaderCell)HeaderCells.GetValue(i, j);
                    if (HeaderCell == null)
                        continue;
                    RowHeaderCell.RowHeaderCells.Add(HeaderCell);
                }
                HeaderRows.Add(RowHeaderCell);
            }
            return HeaderRows;
        }
    }
}