Tray icon does not disappear on killing process

Use this tool http://www.codeproject.com/Articles/19620/LP-TrayIconBuster

It iterates through ToolBarButtons in TrayNotifyWnd & NotifyIconOverflowWindow and removes those with null file names.

There is no solution to this problem. If you kill process with task manager, it does not receive termination notification, and hence can not remove its icon from the tray. Try avoiding killing process this way. You can use net start/stop to kill a service or services.msc GUI.

You can let the icon disappear by calling the Dispose()-method of the specified NotifyIcon-object. In most cases these Container-object isn't part of the tree of components in your application so it will not disappear by killing the proces. When the user moves over the icon, the icon doesn't find it parent so it dissapears. But by calling the Dispose-method, it disapeared at least in my applications. So:

//creating a NotifyIcon
NotifyIcon notifyicon = new NotifyIcon();
notifyicon.Text = "Text"; 
notifyicon.Visible = true; 
notifyicon.Icon = new Icon(GetType(),"Icon.ico");
//let it disappear
notifyicon.Dispose();