Per Session Based - Instance Management in WCF hosted on Web App

Question Arises: What is Instance Management?
 
We can say it is a type of rules governed to manage the services with clients. It provides high end in scalability, durability and effective transaction management.
 
Question Arises: What is Per-Session Based Instance Management?
 
The Sessions are well managed between client and service, when the client creates a new proxy pointing towards a particular service instance the independent service is allocated for the client.
 
So, let's try to implement this concept so that we can get much better idea on this:
 
So, firstly we will create simple method in IService1, Where the Complete Code of IService1.cs looks like this:
 
 using System.ServiceModel;
 namespace SimpleInstanceManagement
 {
     // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
     [ServiceContract(SessionMode = SessionMode.Required)]
     public interface IService1
     { 
         [OperationContract]
         int SimpleMethod(int a);
     }
 }
 
 The Complete Code of Service1.svc looks like this:
 
 using System;
 using System.ServiceModel;
  
 namespace SimpleInstanceManagement
 {
     // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
     [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
     public class Service1 : IService1, IDisposable
     {
         public int Heighter = 0;
         public int SimpleMethod(int a)
         {
             a = (Heighter = Heighter + 1);
             return a;
         }
         public void Dispose()
         {
             Heighter = Heighter " 1;
         }
     }
 }
 
The Complete Code of Web.Config looks like this:
 
 <?xml version="1.0"?>
 <configuration>
        <system.web>
               <compilation debug="true" targetFramework="4.0" />"
        </system.web>
        <system.serviceModel>
               <behaviors>
                      <serviceBehaviors>
                            <behavior name="Application">
                                   <!" To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment ">
                                   <serviceMetadata httpGetEnabled="true"/>
                                   <!" To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception
 information ">
                                   <serviceDebug includeExceptionDetailInFaults="false"/>
                            </behavior>
                      </serviceBehaviors>
               </behaviors>
               <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
               <services>
                      <service name="SimpleInstanceManagement.Service1"" behaviorConfiguration="Application">
                            <endpoint address="/SimpleAddress" binding="wsHttpBinding" contract="SimpleInstanceManagement.IService1">"</endpoint>
                            <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange">
                            </endpoint>
                            <host>
                                   <baseAddresses>
                                          <add baseAddress="http://localhost:49257/Service1.svc"/>
                                   </baseAddresses>
                             </host>
                      </service>
               </services>
        </system.serviceModel>
        <system.webServer>
               <modules runAllManagedModulesForAllRequests="true"/>
        </system.webServer>
 </configuration>
 
I have created New Web Application where I have added it to existing solution files. I have specified service reference with a link as given below:
 
http://localhost:49257/Service1.svc
 
The Complete Code of WebForm1.aspx looks like this:
 
 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Instance.WebForm1"" %>
  
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head id="Head1" runat="server">
     <title></title>
 </head>
 <body>
     <form id="form1"" runat="server">
     <div>
         <center>
             <table>
                 <tr>
                     <td>
                         <asp:Label ID="Label1"" runat="server" Text="Please Enter Some Value" ForeColor="Brown"
                             Font-Bold=" true" Font-Italic="true"></asp:Label>
                     </td>
                     <td>
                         <asp:TextBox ID="TextBox1"" runat="server"></asp:TextBox>
                     </td>
                 </tr>
                 <tr>
                     <td>
                     </td>
                     <td>
                         <asp:Button ID="Button1"" runat="server" Text="Click Here" OnClick="Button1Click"
                             Style="margin-left: 0px" Width="118px" />
                     </td>
                 </tr>
             </table>
         </center>
     </div>
     </form>
 </body>
 </html>
 
The Complete Code of WebForm1.aspx.cs looks like this:
 
 using System;
 using Instance.ServiceReference1;
  
 namespace Instance
 {
     public partial class WebForm1 : System.Web.UI.Page
     {
         protected void PageLoad(object sender, EventArgs e)
         {
         }
         protected void Button1Click(object sender, EventArgs e)
         {
             if (TextBox1.Text != null)
                 if ((TextBox1.Text)=="1")
                 {
                     var ab = new Service1Client();
                     Response.Write("<center>The Value is: <b>" + ab.SimpleMethod((Convert.ToInt32(TextBox1.Text))) +
                         "</br></b></center>");
                     Response.Write("<center>The Value is: <b>" + ab.SimpleMethod((Convert.ToInt32(TextBox1.Text))) +
                         "</br></b></center>");
                     Response.Write("<center>The Value is: <b>" + ab.SimpleMethod((Convert.ToInt32(TextBox1.Text))) +
                         "</br></b></center>");
                     Response.Write("<center><i>Second Instance Created for Service</i></center>");
                     var bc = new Service1Client();
                     Response.Write("<center>The Value is: <b>" + bc.SimpleMethod(Convert.ToInt32(TextBox1.Text)) +
                         "</br></b></center>");
                     Response.Write("<center>The Value is: <b>" + bc.SimpleMethod(Convert.ToInt32(TextBox1.Text)) +
                         "</br></b></center>");
                     Response.Write("<center>The Value is: <b>" + bc.SimpleMethod((Convert.ToInt32(TextBox1.Text))) +
                         "</br></b></center>");
                     Response.Write("<center>The Value is: <b>" + bc.SimpleMethod((Convert.ToInt32(TextBox1.Text))) +
                         "</br></b></center>");
                 }
                 else
                 {
                     Response.Write("<center><b><i>Please Enter Some Values or Enter Correct Values</i></b></center>");
                 }
             }
         }
     }
 }
 
The Output of the Application looks like this:


 
The Output of the Application for incorrect results looks like this:


I hope this article is useful for you. I look forward for your comments and feedback.