Question

I am writing a .NET Remoting application. I have my dll, server, and client all working correctly. However, when I try to change my method call to take an object parameter instead of a simple type like an int, it complains with this error.

Type System.Runtime.Remoting.ObjRef and the types from it (such as
System.Runtime.Remoting.ObjRef) are not permitted to be deserialized
at this security level.

The method is something like this.

public List<Orders> GetOrders(int UserID) { //Works

public List<Orders> GetOrders(Users user) { // Doesnt Work

[Serializable]
public class Users : MarshalByRefObject {

Now I have made the User class also, [Serializable] and given it MarshalByRefObject inheritance. Could this be my problem? I have tried removing [Serializable] from the User class and it complains cause it cant interpret it.

EDIT
Ok, here is my client method.

IChannel channel = new TcpClientChannel();
ChannelServices.RegisterChannel(channel, false);
CustomType Server = (CustomType)Activator.GetObject(typeof(CustomType), "tcp://localhost:9934/CustomType");

Here is my server.

BinaryServerFormatterSinkProvider provider = new BinaryServerFormatterSinkProvider();
provider.TypeFilterLevel = TypeFilterLevel.Full;
IDictionary props = new Hashtable();
props["port"] = 9934;
TcpChannel channel = new TcpChannel(props, null, provider);
ChannelServices.RegisterChannel(channel);
RemotingConfiguration.RegisterWellKnownServiceType(typeof(CustomType), "CustomType", WellKnownObjectMode.Singleton);
Console.WriteLine("Server is initialized");
Console.ReadLine();

Answer 1

Actually, .NET remoting is an obsolete technology. You should take a look at WCF instead.

Regarding your actual problem:
Your probably running your application in a trust-level that is too low.
The Users class should be serializable, but, if it does not contain any methods that should run at the server, it should not derive from MarshalByRefObject