.NET (Core and Framework)

/**
 * Constructor of public sealed class RestrictedType1
 * Cotains in RestrictedAssembly.
 * Caller is required to pass a type object
 * o is the Type who wish to instantiate this class.
 */
public RestrictedType1(Type o) {
   Type t = this.GetType ();
   byte [] t1Token = o.Assembly.GetName().GetPublicKeyToken();
   byte [] t2Token = t.Assembly.GetName().GetPublicKeyToken();
   AccessNotAllowedEx ex = new AccessNotAllowedEx("Not Allowed");
   
   if(t1Token != null && t2Token != null) {			
      if(t1Token.Length == t2Token.Length) {
         for(int i = 0; i< t1Token.Length; i++) { 
            if (t1Token[i] == t2Token[i]) 
               continue; 
            else 
               throw ex;
         }
         // If get here successfullyDone;
         ex = null;                    
      } else 
         throw ex;
   } else 
      throw ex;
}

RestrictedType1 res = new RestrictedType1(this.GetType);

RestrictedType1 res = new RestrictedType1(typeof(TypeFromCallerOfRestrictedAssembly));

<br />
namespace myWCFCallBackService<br />
{<br />
    /// <summary><br />
    /// The interface the service exposes<br />
    /// One Session to each client<br />
    /// </summary><br />
    [ServiceContract(SessionMode=SessionMode.Required, CallbackContract = typeof(IChangedHandler))]<br />
    public interface IChat<br />
    {<br />
        //Opens a new session when executed<br />
        [OperationContract(IsOneWay=false, IsInitiating = true)]<br />
        void Subscribe(string inName);<br />
<br />
        //Close the current session bound to the current client<br />
        [OperationContract(IsOneWay = false, IsTerminating = true)]<br />
        void Unsubscribe();<br />
<br />
        //Lets the client post a message<br />
        [OperationContract(IsOneWay = true)]<br />
        void publishNewMessage(string inMessage, string inName);<br />
    }<br />
<br />
    /// <summary><br />
    /// The interface that clients must implement<br />
    /// </summary><br />
    public interface IChangedHandler<br />
    {<br />
        [OperationContract(IsOneWay = true)]<br />
        void changed(string newMessage);<br />
    }<br />
<br />
    /// <summary><br />
    /// A singelton object of the chat class to be able to subscribe clients<br />
    /// </summary><br />
    [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]<br />
    public class chat : IChat<br />
    {<br />
        private List<IChangedHandler> mSubscribers = new List<IChangedHandler>();<br />
<br />
        public chat()<br />
        {<br />
<br />
        }<br />
<br />
        public void Subscribe(string inName)<br />
        {<br />
            mSubscribers.Add(OperationContext.Current.GetCallbackChannel<IChangedHandler>());<br />
        }<br />
<br />
        public void Unsubscribe()<br />
        {<br />
            IChangedHandler caller =<br />
                OperationContext.Current.GetCallbackChannel<IChangedHandler>();<br />
<br />
            foreach (IChangedHandler ch in mSubscribers)<br />
            {<br />
                if (ch == caller)<br />
                {<br />
                    mSubscribers.Remove(ch);<br />
                    break;<br />
                }<br />
            }<br />
        }<br />
        public void publishNewMessage(string inMessage, string inName)<br />
        {<br />
            int nIndex = 0;<br />
            try<br />
            {<br />
                foreach (IChangedHandler ch in mSubscribers)<br />
                {<br />
                    ch.changed(inMessage);<br />
                    nIndex++;<br />
                }<br />
            }<br />
            catch (Exception ex)<br />
            {<br />
                mSubscribers.RemoveAt(nIndex);<br />
            }<br />
        }<br />
    }<br />
}<br />

<br />
        private void initializeHost()<br />
        {<br />
            Uri addr;<br />
            try<br />
            {<br />
                mChat = new chat();<br />
<br />
                addr = new Uri(ConfigurationManager.AppSettings["baseTcpTempService"]);<br />
                mServiceHost = new ServiceHost(mChat, addr);<br />
<br />
                addr = new Uri(ConfigurationManager.AppSettings["basePipeTempService"]);<br />
                mServiceHost.AddServiceEndpoint(typeof(myWCFCallBackService.IChat), new NetNamedPipeBinding(), addr);<br />
<br />
                mServiceHost.Open();<br />
               <br />
                lstStatus.Items.Insert(0, DateTime.Now.ToString() + " - Chat server is running.");<br />
            }<br />
            catch(Exception ex)<br />
            {<br />
                MessageBox.Show("Error: " + ex.Message);<br />
            }<br />
        }<br />

<br />
appSettings><br />
add key="baseTcpTempService" value="net.tcp://localhost:9000/chat" /><br />
add key="basePipeTempService" value="net.pipe://localhost/chat" /><br />
/appSettings><br />
system.serviceModel><br />
services><br />
service name="TempSensor"><br />
endpoint<br />
address=""<br />
binding="netTcpBinding"<br />
contract="ITempChangedPub"<br />
/><br />
/service><br />
/services><br />
/system.serviceModel><br />

<br />
      <?xml version="1.0" encoding="utf-8" ?><br />
      <configuration><br />
          <system.serviceModel><br />
              <behaviors><br />
                  <serviceBehaviors><br />
                      <behavior name="myServiceTypeBehavior"><br />
                          <serviceMetadata httpGetEnabled="True"/><br />
                      </behavior><br />
                  </serviceBehaviors><br />
              </behaviors><br />
              <services><br />
                  <service name="myWCFServerObjectSender.personService" behaviorConfiguration="myServiceTypeBehavior"><br />
                      <endpoint address="http://localhost/person"<br />
                                binding="basicHttpBinding"<br />
                                contract="myWCFServerObjectSender.personService"><br />
                      </endpoint><br />
                      <endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" /><br />
                  </service><br />
              </services><br />
          </system.serviceModel><br />
      </configuration><br />