WinForms TreeMap Control

using Syncfusion.Windows.Forms.TreeMap;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        TreeMap TreeMap1 = new TreeMap();
        public Form1()
        {
            InitializeComponent();
            TreeMap1.Size = new System.Drawing.Size(880, 585);
            this.ClientSize = new System.Drawing.Size(880, 585);
            TreeMap1.ItemsSource = this.GetPopulationDetails();
            TreeMap1.WeightValuePath = "Population";
            TreeMap1.ColorValuePath = "Growth";
            TreeMap1.ItemsLayoutMode = Syncfusion.Windows.Forms.TreeMap.ItemsLayoutModes.Squarified;
            TreeMapFlatLevel treeMapFlatLevel1 = new TreeMapFlatLevel();
            treeMapFlatLevel1.GroupPath = "Continent";
            treeMapFlatLevel1.ItemsGap = 2;
            TreeMap1.Levels.Add(treeMapFlatLevel1);
            TreeMapFlatLevel treeMapFlatLevel2 = new TreeMapFlatLevel();
            treeMapFlatLevel2.GroupPath = "Country";
            treeMapFlatLevel2.HeaderHeight = 25;
            TreeMap1.Levels.Add(treeMapFlatLevel2);
            this.Controls.Add(TreeMap1);
        }
        private DataTable GetPopulationDetails()
        {
            DataTable PopulationDetails = new DataTable();
            PopulationDetails.Columns.Add("Continent", typeof(string));
            PopulationDetails.Columns.Add("Country", typeof(string));
            PopulationDetails.Columns.Add("Growth", typeof(double));
            PopulationDetails.Columns.Add("Population", typeof(double));
            PopulationDetails.Columns.Add("StrPopulation", typeof(string));
            PopulationDetails.Rows.Add("Asia", "Indonesia", 3, 237641326, "237.6 M");
            PopulationDetails.Rows.Add("Asia", "Russia", 2, 152518015, "152.5 M");
            PopulationDetails.Rows.Add("Asia", "Malaysia", 1, 29672000, "29.7 M");
            PopulationDetails.Rows.Add("North America", "United States", 4, 315645000, "315.6 M");
            PopulationDetails.Rows.Add("North America", "Mexico", 2, 112336538, "112.3 M");
            PopulationDetails.Rows.Add("North America", "Canada", 1, 35056064, "35.1 M");
            PopulationDetails.Rows.Add("South America", "Colombia", 1, 47000000, "47 M");
            PopulationDetails.Rows.Add("South America", "Brazil", 3, 193946886, "193.9 M");
            PopulationDetails.Rows.Add("Africa", "Nigeria", 2, 170901000, "170.9 M");
            PopulationDetails.Rows.Add("Africa", "Egypt", 1, 83661000, "83 M");
            PopulationDetails.Rows.Add("Europe", "Germany", 1, 81993000, "82 M");
            PopulationDetails.Rows.Add("Europe", "France", 1, 65605000, "65.6 M");
            PopulationDetails.Rows.Add("Europe", "UK", 1, 63181775, "63.2 M");
            return PopulationDetails;
        }
    }
}