Use WCF  Communication with role instance in azure

1)In worker role build WCF Service

public override void Run()        {            // This is a sample worker implementation. Replace with your logic.            Trace.TraceInformation("WorkerRole1 entry point called", "Information");            while (true)            {                Thread.Sleep(10000);                Trace.TraceInformation("Working", "Information");            }        }        private ServiceHost serviceHost;        private void CreateServiceHost()        {            serviceHost = new ServiceHost(typeof(WcfService));            NetTcpBinding binding = new NetTcpBinding(SecurityMode.None);            //  RoleInstanceEndpoint externalEndPoint = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["WcfEndpoint"];            string ip = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["WcfEndpoint"].IPEndpoint.Address.ToString();            int tcpport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["WcfEndpoint"].IPEndpoint.Port;            string endpoint = String.Format("net.tcp://{0}:{1}/LoanCalculator", ip, tcpport);            //#region insert Instance Information to azure table            //InstanceInformation instance = new InstanceInformation();            //instance.IP = endpoint;            //instance.Port = tcpport;            //// cpu             //System.Diagnostics.PerformanceCounter PC = new System.Diagnostics.PerformanceCounter();            ////  instance.CPURate=PC.            //#endregion            serviceHost.AddServiceEndpoint(typeof(IWcfService), binding, endpoint);            try            {               // ServiceLib.AzureTableMethod.InSertInstanceInformation("wcfTable", instance);                serviceHost.Open();            }            catch            {            }        }        public override bool OnStart()        {            // Set the maximum number of concurrent connections            // ServicePointManager.DefaultConnectionLimit = 12;            ServicePointManager.DefaultConnectionLimit = 12;            CreateServiceHost();            // For information on handling configuration changes            // see the MSDN topic at http://go.microsoft.com/fwlink/?LinkId=166357.            return base.OnStart();        }

2)In Web role build WCF Client

protected void Page_Load(object sender, EventArgs e)        {        }        protected void Button1_Click(object sender, EventArgs e)        {            // http://jambor.cloudapp.net/            //  string serviceUrl = "net.tcp://jambor.cloudapp.net/LoanCalculator";            // string serviceUrl = String.Format("net.tcp://{0}:{1}/LoanCalculator", "127.0.0.1", "8082");            //string serviceUrl = "net.tcp://207.46.129.69:8082/LoanCalculator";            string address = RoleEnvironment.Roles["WorkerRole1"].Instances[0].InstanceEndpoints["WcfEndpoint"].IPEndpoint.Address.ToString();            int tcpport = RoleEnvironment.Roles["WorkerRole1"].Instances[0].InstanceEndpoints["WcfEndpoint"].IPEndpoint.Port;             //  string d=   TextBox2.Text;            string serviceUrl = string.Format("net.tcp://{0}:{1}/LoanCalculator", address, tcpport);            NetTcpBinding binding = new NetTcpBinding(SecurityMode.None);            ChannelFactory< IWcfChannel> ChannelFactory = new ChannelFactory
      
       (binding, new EndpointAddress(serviceUrl));            IWcfChannel sss = ChannelFactory.CreateChannel();            string oldString = TextBox1.Text;            if (!string.IsNullOrEmpty(oldString.ToString()))            {                Label1.Text = sss.ReverseString(oldString);            }        }
      

PS: If we need to Use role communication we need to add new endpoint and set type as Internal as following screenshot:

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