How to insert root node in Treeview using EF

 x:Class="WpfTutorialSamples.TreeView_control.TreeViewMultipleTemplatesSample"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:self="clr-namespace:WpfTutorialSamples.TreeView_control"
        Title="TreeViewMultipleTemplatesSample" Height="200" Width="250">
         Margin="10">
                 Name="trvFamilies">
                        
                                 DataType="{x:Type self:Family}" ItemsSource="{Binding Members}">
                                         Orientation="Horizontal">
                                                 Source="/WpfTutorialSamples;component/Images/group.png" Margin="0,0,5,0" />
                                                 Text="{Binding Name}" />
                                                 Text=" [" Foreground="Blue" />
                                                 Text="{Binding Members.Count}" Foreground="Blue" />
                                                 Text="]" Foreground="Blue" />
                                        
                                
                                 DataType="{x:Type self:FamilyMember}">
                                         Orientation="Horizontal">
                                                 Source="/WpfTutorialSamples;component/Images/user.png" Margin="0,0,5,0" />
                                                 Text="{Binding Name}" />
                                                 Text=" (" Foreground="Green" />
                                                 Text="{Binding Age}" Foreground="Green" />
                                                 Text=" years)" Foreground="Green" />
                                        
                                
                        
                
        

using System;
using System.Collections.Generic;
using System.Windows;
using System.Collections.ObjectModel;

namespace WpfTutorialSamples.TreeView_control
{
        public partial class TreeViewMultipleTemplatesSample : Window
        {
                public TreeViewMultipleTemplatesSample()
                {
                        InitializeComponent();

                        List<Family> families = new List<Family>();

                        Family family1 = new Family() { Name = "The Doe's" };
                        family1.Members.Add(new FamilyMember() { Name = "John Doe", Age = 42 });
                        family1.Members.Add(new FamilyMember() { Name = "Jane Doe", Age = 39 });
                        family1.Members.Add(new FamilyMember() { Name = "Sammy Doe", Age = 13 });
                        families.Add(family1);

                        Family family2 = new Family() { Name = "The Moe's" };
                        family2.Members.Add(new FamilyMember() { Name = "Mark Moe", Age = 31 });
                        family2.Members.Add(new FamilyMember() { Name = "Norma Moe", Age = 28 });
                        families.Add(family2);

                        trvFamilies.ItemsSource = families;
                }
        }

        public class Family
        {
                public Family()
                {
                        this.Members = new ObservableCollection<FamilyMember>();
                }

                public string Name { get; set; }

                public ObservableCollection<FamilyMember> Members { get; set; }
        }

        public class FamilyMember
        {
                public string Name { get; set; }

                public int Age { get; set; }
        }
}