C#

CREATE TABLE GENERICPROPERTY (
...
CreatedBy numeric(19,0) DEFAULT -1 NOT NULL,
...
)

oParam = oCmd.CreateParameter();
oParam.ParameterName = DBUtil.FixParameterNameForOracle(oContext.DefaultDBProvider, "@CreatedBy");
oParam.DbType = DbType.Int64;
oParam.Direction = ParameterDirection.Input;
oParam.Value = oContext.LogonUserId; << This is .NET Int64/long
oCmd.Parameters.Add(oParam);

public interface IBase {

   int IntTest { get; }
   String StringTest { get; }
   IOther OtherTest { get; }

   String Test(String txt);
   IOther Test3();
}

public interface IOther {
   String StringTest { get; }
   String Test(String txt);
}

public class Base : MarshalByRefObject, IBase {

   public int IntTest {
     get { return 4; }
   }

   public string StringTest {
     get { return "A string from Base"; }
   }

   public IOther OtherTest {
     get { return new Other(); }
   }

   public string Test(string txt) {
     return "Base called with: " + txt;
   }

   public IOther Test3() {
     return new Other();
   }

}

public class Other : MarshalByRefObject, IOther {

   public string StringTest {
     get { return "A string from Other"; }
   }

   public string Test(string txt) {
     return "Other method called with: " + txt;
   }

}

public MainWindow() {
   InitializeComponent();
   IpcChannel ipcCh = new IpcChannel("IPChannelName");
   ChannelServices.RegisterChannel(ipcCh, false);
  RemotingConfiguration.RegisterWellKnownServiceType(typeof(Base), "CName", WellKnownObjectMode.Singleton);
}

IpcChannel ipcCh = new IpcChannel("myClient");
ChannelServices.RegisterChannel(ipcCh, false);
obj = (IBase)Activator.GetObject(typeof(IBase), "ipc://IPChannelName/CName");
Console.WriteLine("Returns: " + obj.Test("a text"));
Console.WriteLine("Returns: " + obj.StringTest + " " + obj.StringTest.Length);
Console.WriteLine("Returns: " + obj.IntTest);
Console.WriteLine(obj.OtherTest.ToString());