Sometimes while developing some of you might notice a lot instances of Visual Studio Development Server (aka Cassini) in your system tray� Many of these icons when clicked on land up just vanishing away and at times these icons may flood the system tray causing frustration� Sorry for that :-(
One of the reasons for this happening is that ASP.NET Development server is set up to use dynamic port allocation as shown below:
WAP (Right Click Project �> Properties �> Web)
Web Sites (Select Web Sites �> F4 to see properties)
Sometimes on some developer boxes either Windows firewall or custom firewall blocks a bunch of ports� In this situation Web Development Server tries to hook to one of the blocked ports port and is not allowed to� In the process the Development Server lands up crashing� Next time it tries to assign itself to another dynamic port and the same thing happens� As a result there are various tray icons created even though the Web Development Server exe has actually crashed� That is the reason when you hover over the icons in the system tray they vanish away�
Firstly, let me call out that this is a bug, I just verified it with our key dev Bill Hiebert and he confirmed that this is now fixed in VS 2010� For the time being the work around for
VS 2008 developers is to go ahead and turn off the Auto-assign Port/Use Dynamic ports option and actually set a fixed port which you know is not blocked by one of your firewalls� Hopefully with this the multiple icons in the system tray should no longer appear�
If you still face problem then do write back�
-Vishal
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