invalid unicode character !期待高手

Question

C#调用代码： 
TcpChannel tc= new TcpChannel(); 
ChannelServices.RegisterChannel(tc); remoteObject = (MyRemotableObject)Activator.GetObject(typeof(MyRemotableObject), "tcp://localhost:8080/HelloWorld"); textBox2.Text=  remoteObject.SetMessage(textBox1.Text); 
DELPHI调用
s:widestring;
WS:= (HTTPRIO1 as MyRemotableObjectPortType); 
s:=  ws.SetMessage('av');返回过程报错部分已经显示出来了，
INVALID UNICODE CHARACTER！ 
line:16 
&#x1E;</Retrun>

Answer 1

把'av’改成widestring 用变量传入试试

Answer 2

服务器已经接受到了，而且有返回结果，但
DELPHI调用 
s:widestring; 
WS:= (HTTPRIO1 as MyRemotableObjectPortType); 
s:=  ws.SetMessage('av'); 返回过程报错部分已经显示出来了， 
INVALID UNICODE CHARACTER！ 
line:16 
&#x1E; </Retrun>