i have tried several ways,and found it depand on how i deploy the project:
1 if i deploy the "debug" directory of the visual studio as "web share"(right click the directory,and select "web share" tab,select appropriate radio button..........),then from client side,i can lauch it,but it will shutdown spontaneously after a while if i don't touch it.then a windows debug windows pop up ,it saild that the "FileNotFound" occur to the "ieexec.exe"and ask me to select a debug tools.
otherwise,if i close the form MANUALLY , the same debug windows pop up too.
2 if i copy the "*.exe" file from the debug directory to the subdirectory of wwwroot,it works well,NO spontaneous shutting down and NO pop up debug form.
according to the two scenario,it seem like that if i deploy it WITHIN the iis box,it woiks well.
why ?i wonder what is the difference between the iis in-box delpoyment and web share directory deployment?