When a delegate is declared as static,it has to be instantiated somewhere,but where????

What's New In Windows Communication Foundation (WCF) 4.0 Part- I

VS 2010 and .NET 4.0 has come out with many new features. Typically there are a lot of changes in Windows Workflow 4.0 (WF 4.0), Windows Presentation Foundation (WPF 4.0) and Windows Communication Foundation (WCF 4.0).

Following are some of the new features provided with WCF 4.0:

- Simple Configuration

- Serialization Enhancements

-  Web Programming

- Service Discovery

- Router Service

- Workflow Service

WCF Service and WCF Client Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Description;
namespace ServiceApplication
{
    // Service
    [ServiceContract]
    public class MathService
    {
        [OperationContract]
        public double Sum(double x, double y)
        {
            return x + y;
        }
        [OperationContract]
        public double Mul(double x, double y)
        {
            return x * y;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            ServiceHost host =
                new ServiceHost(typeof(MathService)); // service
            //host.AddServiceEndpoint(
            //    typeof(MathService), // contract
            //    new WSHttpBinding(), // binding
            //    "http://localhost:8000/MathService"); // address
            //host.AddServiceEndpoint(
            //    typeof(MathService), // contract
            //    new NetTcpBinding(), // binding
            //    "http://localhost:8000/MathService"); // address
            //host.Description.Behaviors.Add(
            //    new ServiceMetadataBehavior()
            //    {
            //        HttpGetEnabled=true,
            //        HttpGetUrl = new Uri("http://localhost:8000/MathService/WSDL")
            //    });
            host.Open();
            Console.WriteLine("Runtime state: " + host.State);
            Console.WriteLine("Press enter to stop runtime...");
            Console.ReadLine();
        }
    }
}
Service:config file

<?
<
<

<
<xml version="1.0" encoding="utf-8" ?>configuration>system.serviceModel>services>service name="ServiceApplication.MathService"
<behaviorConfiguration="MathServiceBehavior">endpoint address="http://localhost:8000/MathService"binding="wsHttpBinding"

<contract="ServiceApplication.MathService" />endpoint address="net.tcp://localhost:9000/MathService"binding="netTcpBinding"
</
</

<
<
<
<

</
</
</

</
</contract="ServiceApplication.MathService" />service> services>behaviors>serviceBehaviors>behavior name="MathServiceBehavior">serviceMetadata httpGetEnabled="true" httpGetUrl="http://localhost:8000/MathService/WSDL"/>behavior>serviceBehaviors>behaviors>system.serviceModel>configuration>
Client Code:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using ClientApplication.MathServiceReference;namespace
{
ClientApplicationclass Program{

{
MathServiceClient proxy =


}
}
}static void Main(string[] args)new MathServiceClient("NetTcpBinding_MathService");Console.WriteLine(proxy.Sum(10, 20));
client App config Code:

<?
<
<
<
<
<xml version="1.0" encoding="utf-8" ?>configuration>system.serviceModel>bindings>netTcpBinding>binding name="NetTcpBinding_MathService" closeTimeout="00:01:00"openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions"hostNameComparisonMode="StrongWildcard" listenBacklog="10"maxBufferPoolSize="524288" maxBufferSize="65536" maxConnections="10"
<maxReceivedMessageSize="65536">readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
<maxBytesPerRead="4096" maxNameTableCharCount="16384" />reliableSession ordered="true" inactivityTimeout="00:10:00"
<
<
<
</
</
</
<
<enabled="false" />security mode="Transport">transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" />message clientCredentialType="Windows" />security>binding>netTcpBinding>wsHttpBinding>binding name="WSHttpBinding_MathService" closeTimeout="00:01:00"openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"maxBufferPoolSize="524288" maxReceivedMessageSize="65536"messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"
<allowCookies="false">readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
<maxBytesPerRead="4096" maxNameTableCharCount="16384" />reliableSession ordered="true" inactivityTimeout="00:10:00"
<
<enabled="false" />security mode="Message">transport clientCredentialType="Windows" proxyCredentialType="None"
<realm="" />message clientCredentialType="Windows" negotiateServiceCredential="true"
</
</
</
</
<
<algorithmSuite="Default" />security>binding>wsHttpBinding>bindings>client>endpoint address="http://localhost:8000/MathService" binding="wsHttpBinding"bindingConfiguration="WSHttpBinding_MathService" contract="MathServiceReference.MathService"
<
<
</
</
<name="WSHttpBinding_MathService">identity>userPrincipalName value="Shakeel-PC\Shakeel" />identity>endpoint>endpoint address="net.tcp://localhost:9000/MathService" binding="netTcpBinding"bindingConfiguration="NetTcpBinding_MathService" contract="MathServiceReference.MathService"
<
<
</
</
</
</
</name="NetTcpBinding_MathService">identity>userPrincipalName value="Shakeel-PC\Shakeel" />identity>endpoint>client>system.serviceModel>configuration>