This question seems to come up about every other day, and so far has only
been answered once and I didn't understand the answer.

I, too, need to access the remoting object at the server.  I am creating a
singleton object to hold a stack of information in memory, provided by
various clients which add records to the stack.  The server needs to
periodically access the stack to process and delete the entries.

Here is the code I am using to instantiate the object on both client and
server:

Dim args() As Object

_mSCredentials =
CType(Activator.CreateInstance(GetType(RemotingServer.SingletonCredentials),
args), RemotingServer.SingletonCredentials)

The problem is, the object created on the server is not the same instance as
the object on the clients: they both work fine, but they don't see each
other.

I am setting up these objects based on the app.config file, which has
entries like this on the server:

<configuration>
  <system.runtime.remoting>
     <application>
        <service>
            <wellknown
              type="RemotingServer.SingletonCredentials,RemoteCredentials"
              objectUri="SingletonCredentials"
              mode="Singleton"
           />
        </service>
        <channels>
  <channel ref="tcp" port="8080">
   <serverProviders>
    <formatter ref="binary"/>
   </serverProviders>
  </channel>
        </channels>
     </application>
  </system.runtime.remoting>
</configuration>

And this one on the client:

<configuration>
  <system.runtime.remoting>
     <application>
        <client url="tcp://localhost:8080">
        <wellknown
   type="RemotingServer.SingletonCredentials,RemoteCredentials"
   url="tcp://localhost:8080/SingletonCredentials"
   />
     </client>
    </application>
  </system.runtime.remoting>
</configuration>

This is all based on the Microsoft Remoting sample code.  What do I need to
change?