VB.NET的隐藏特性？

我已经学到了相当多的浏览通过 Hidden Features
of C#和惊讶，当我找不到的东西
类似于VB.NET。

那么什么是它的一些隐藏或较少已知的功能？

Exception When子句在很大程度上未知。

考虑这个：

Public Sub Login(host as string,user as String,password as string,_
                            Optional bRetry as Boolean = False)
Try
   ssh.Connect(host,user,password)
Catch ex as TimeoutException When Not bRetry
   ''//Try again,but only once.
   Login(host,password,True)
Catch ex as TimeoutException
   ''//Log exception
End Try
End Sub