删除虚拟网络的时候, 经常会报错:
Virtual network ‘XXXXXXXXXXX‘ is in use and cannot be deleted. If you recently deleted resources, it might take some time to update the virtual network.
解决方法是进入该虚拟网络，首先删除网关(DELETE GATEWAY), 然后再删除虚拟网络就可以了
Azure杂七杂八系列(一) - 如何删除Azure上的虚拟网络
原文：http://www.cnblogs.com/xqzp/p/4476322.html