Windows Server 2012 R2 上安装.net framework4.6.1,提示需安装对应于 KB2919355 的更新
安装KB2919355
参考写法https://support.microsoft.com/kb/包序号/en-us 用于下载补丁，注意选择 Windows Server 2012 R2 X64
https://support.microsoft.com/kb/2919355/en-us
全选下载所有包（clearcompressionflag.exe、KB2919355、KB2932046、KB2959977、KB2937592、KB2938439、KB2934018）
按顺序安装：clearcompressionflag.exe、KB2919355、KB2932046、KB2959977、KB2937592、KB2938439、KB2934018
重启服务器
安装.net framework4.6.1
https://www.microsoft.com/en-us/download/confirmation.aspx?id=49982
双击运行并重启服务器
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!
