.net session.setvariable fails at encoding international characterset

I am developing a project in .net and use the RemoteScrapingSession component.
I have a problem with International characters in strings.

I am from Denmark, so we have a few of these letters.

When I encounter strings with International letters and put them through session.getVariable and session.Setvariable, all the international letters are replaced with ?
I read the FAQ about how to avoid it in screenscraper, but how do you do it, when encoding environment variables.

I suspect that using session.Setobject encodes the string with a wrong encoding.

Here is my test example: (VisualStudio 2008 c# and MSVista)
//TEST æøå bad conversion
const string teststring = "træsko åbenhed bøllefrø";
var remoteSession = new RemoteScrapingSession("Denmark", host, port);
Console.WriteLine(teststring);
remoteSession.SetVariable("LINETEST", teststring);
object test2 = remoteSession.GetVariable("LINETEST");
Console.WriteLine(test2);

Result:
træsko åbenhed bøllefrø
tr?sko ?benhed b?llefr?

Why does SetVariable/GetVariable do this?