WPF

///////////////////////////////////////////////////
//History
TreeView1.Items.Clear();

Image imageHistory = new Image();
imageHistory.Source = new BitmapImage(new Uri(@"/passwordManager;component/images/TreeView/history.png", UriKind.Relative));
imageHistory.Width = imageHistory.Height = 16;

Label labelHistory = new Label();
labelHistory.Content = "History";

StackPanel stackPanelHistory = new StackPanel();
stackPanelHistory.Orientation = Orientation.Horizontal;
stackPanelHistory.Children.Add(imageHistory);
stackPanelHistory.Children.Add(labelHistory);

TreeViewItem treeViewHistory = new TreeViewItem();
treeViewHistory.Name = "TreeViewItemHistory";
treeViewHistory.Header = stackPanelHistory;

TreeView1.Items.Add(treeViewHistory);

<TreeView x:Name="TreeView1" FontSize="13" Grid.Column="0" BorderBrush="Transparent" Padding="0">
    <TreeViewItem Name="TreeViewItemHistory">
        <TreeViewItem.Header>
            <StackPanel Orientation="Horizontal">
                <Image Source="images/TreeView/history.png" Width="16" Height="16"></Image>
                <Label Content="History"/>
            </StackPanel>
        </TreeViewItem.Header>
    </TreeViewItem>
</TreeView>

private void MenuItem_Click(object sender, System.Windows.RoutedEventArgs e)
{
    for (int i = 0; i < 10; i++)
    {
        Image img1 = new Image();
        img1.Source = new BitmapImage(new Uri(@"/passwordManager;component/images/TreeView/empty-bookmark.png", UriKind.Relative));
        img1.Width = img1.Height = 16;

        Label label = new Label();
        label.Content = "Test " + i;

        StackPanel sp = new StackPanel();
        sp.Orientation = Orientation.Horizontal;
        sp.Children.Add(img1);
        sp.Children.Add(label);

        TreeViewItem treeViewItem = new TreeViewItem();
        treeViewItem.Name = "TreeViewItem" + i;
        treeViewItem.Header = sp;

        TreeViewItemHistory.Items.Add(treeViewItem);
    }
} 

<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Threading;<br />
using System.ServiceModel;<br />
using System.ServiceModel.Description;<br />
using System.Collections;<br />
<br />
namespace ServerConsole<br />
<br />
{<br />
<br />
    [ServiceContract ]<br />
<br />
    public interface IService1<br />
    {<br />
<br />
        [OperationContract]<br />
        String GetMessage(String name);<br />
<br />
        [OperationContract]<br />
        string GetData(int value);<br />
<br />
 <br />
<br />
    }<br />
<br />
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Single)]<br />
<br />
     //   [ServiceBehavior( InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]<br />
<br />
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Single)]<br />
<br />
   // [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Multiple)]<br />
<br />
 // [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Single)]<br />
<br />
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Multiple)]<br />
<br />
   <br />
<br />
   <br />
<br />
   <br />
<br />
    public class Service1 : IService1<br />
<br />
    {<br />
<br />
       //Dictionary<int, string> d = new Dictionary<int, string>();<br />
<br />
       Int32 someNumber;<br />
<br />
      <br />
<br />
        Service1()<br />
<br />
        {<br />
<br />
            Console.WriteLine("{0} : Created new instance ", System.DateTime.Now);<br />
<br />
        }<br />
<br />
 <br />
<br />
        public string GetData(int value)<br />
<br />
        {<br />
<br />
           <br />
<br />
            //Console.WriteLine("{0} : Get data called on thread {1}", System.DateTime.Now, Thread.CurrentThread.ManagedThreadId);<br />
<br />
 <br />
            someNumber = value;<br />
<br />
<br />
 <br />
<br />
            Random rand = new Random();<br />
<br />
 <br />
<br />
            Thread.Sleep(rand.Next(1000));<br />
<br />
 <br />
<br />
            // show the current value of the field and parameter<br />
<br />
 <br />
<br />
            // with percall, they will always be the same<br />
<br />
 <br />
<br />
            Console.WriteLine("parameter = {0}, somenumber = {1}, thread = {2}\n",<br />
<br />
 <br />
<br />
              value.ToString(),<br />
<br />
 <br />
<br />
              someNumber.ToString(),<br />
<br />
 <br />
<br />
              Thread.CurrentThread.ManagedThreadId);<br />
<br />
 <br />
            return string.Format("You entered: {0}", value);<br />
<br />
           <br />
<br />
        }<br />
<br />
 <br />
        public String GetMessage(String name)<br />
<br />
        {<br />
<br />
            Console.WriteLine("{0} : Get Message called on thread {1}", System.DateTime.Now, Thread.CurrentThread.ManagedThreadId);<br />
<br />
            return "Hello world from " + name + "!";<br />
<br />
        }<br />
<br />
    }<br />
<br />
<br />
    class Program<br />
<br />
    {<br />
<br />
        static void Main(string[] args)<br />
<br />
        {<br />
<br />
            ServiceHost serviceHost = new ServiceHost(typeof(Service1), new Uri("http://localhost:8001/ServerConsole"));<br />
<br />
            serviceHost.AddServiceEndpoint(typeof(IService1), new WSHttpBinding(), "");<br />
<br />
 <br />
<br />
            ServiceMetadataBehavior smb = new ServiceMetadataBehavior();<br />
<br />
            smb.HttpGetEnabled = true;<br />
<br />
            serviceHost.Description.Behaviors.Add(smb);<br />
<br />
 <br />
<br />
            serviceHost.Open();<br />
<br />
 <br />
<br />
 <br />
<br />
            Console.ReadKey();<br />
<br />
 <br />
<br />
            serviceHost.Close();<br />
<br />
        }<br />
<br />
    }<br />
<br />
}<br />
<br />
<br />
but through this code i cannot understand properly  the concurrency mode,<br />
<br />
do any one have code to under stand concurrency mode clearly.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 <br />
<br />