Problem with printing text from RTBox

Question

Hi folks! I have a little problem, and it concers RTBoxes and muliple classes. My project consits of two projects in one.. One class manages the GUI and output and the other class manage fileoperations (i call it FileHandler) and counts code from a desired file or directory that a user specifies in the GUI. The filehandler uses events, and the GUI class has listeners on these events. So, when an event occurs in the filekHandler class the GUI catches it and passes the control on to a method call WriteOutput() (here is the problem) the writeoutput looks like this: public void WriteOutput(object source, string[] FileInfo) { rTBOutputBox.Focus(); for (int i=0; i