WPF

using System;
using System.Data;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;

namespace Manufactured_Housing_Manager
{
    public class Contact : INotifyPropertyChanged
    {
        private string _name = String.Empty;
        private int _id = 0;

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }  

        public string Name
        {
            get { return this._name; }

            set
            {
                if (value != this._name)
                {
                    this._name = value;
                    NotifyPropertyChanged("Name");
                }
            }  
        }

        public int Id
        {
            get { return this._id; }
            
            set
            {
                if (value != this._id)
                {
                    this._id = value;
                    NotifyPropertyChanged("Id");
                }
            }  
        }

        public Contact()
        {
        }

        public Contact(string name, int id)
        {
            _name = name;
            _id = id;
        }
    } 
}

<HierarchicalDataTemplate x:Key="ChildTemplate">
    <StackPanel Orientation="Horizontal">
        <Image x:Name="img2" Width="16"  Height="16" Stretch="Fill" Source="Images\closedfolder16.png" />
        <TextBlock Text="{Binding Path=Index}" Margin="5,0" ToolTip="{Binding Path=Index}"/>
    </StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate x:Key="MyTreeViewStyle"
                          ItemsSource="{Binding Path=Contacts}"
                          ItemTemplate="{StaticResource ChildTemplate}">
    <!-- Display the Index by showing it's Index string -->
    <StackPanel Orientation="Horizontal">
        <Image x:Name="img" Width="16" Height="16" Stretch="Fill" Source="Images\closedfolder16.png" />
        <TextBlock Text="{Binding Path=Name}" Margin="5,0" ToolTip="{Binding Path=Name}"/>
    </StackPanel>
</HierarchicalDataTemplate>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
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;
using System.Collections.ObjectModel;

namespace Manufactured_Housing_Manager
{
    /// <summary>
    /// Interaction logic for Outlookbar.xaml
    /// </summary>
    public partial class Outlookbar : UserControl
    {        
        static public ObservableCollection<Contact> Contacts = new ObservableCollection<Contact>();

        public Outlookbar()
        {
            InitializeComponent();
            InitializeTreeview(); 
        }

        #region left, right, mid string functions

        public static string left(string param, int length)
        {
            //we start at 0 since we want to get the characters starting from the
            //left and with the specified length and assign it to a variable
            string result = param.Substring(0, length);
            //return the result of the operation
            return result;
        }

        public static string mid(string param, int startIndex, int length)
        {
            //start at the specified index in the string and get the number of
            //characters depending on the length and assign it to a variable
            string result = param.Substring(startIndex, length);
            //return the result of the operation
            return result;
        }

        public static string right(string param, int length)
        {
            //start at the index based on the length of the string minus
            //the specified length and assign it a variable
            string result = param.Substring(param.Length - length, length);
            //return the result of the operation
            return result;
        }

        #endregion

        private void InitializeTreeview()
        {
            Contacts.Add(new Contact("Davis, Adam T.", 1));
            Contacts.Add(new Contact("Zappa, Frank", 2));

            // This is where I need to add the code to populate the treeview with name data

 
            myTreeView.DataContext = Contacts;
        }

    }
}

[TemplatePart(Name="PART_Box", Type=typeof(CheckBox)]

DefaultStyleKeyProperty.OverrideMetadata(typeof(TreeViewEx), new FrameworkPropertyMetadata(typeof(TreeViewEx)));