ss 的3.3.4版本的错误。怎么破？
看release note ，发现需要4.6
![System.MissingMethodException: Method not found: 'Void System.Security.Cryptography.RandomNumberGenerator.GetBytes(Byte[], Int32, Int32)](https://moneyslow.com/wp-content/uploads/2016/10/1-2.jpg)
微软下载即可：
https://www.microsoft.com/en-us/download/details.aspx?id=48130
Microsoft .NET Framework 4.6 (Web Installer) for Windows Vista SP2, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2008 SP2 Windows Server 2008 R2 SP1, Windows Server 2012 and Windows Server 2012 R2