c# 调用MD5CryptoServiceProvider出现 System.InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.

进注册表
按Win+R运行regedit
修改下面的值为0就可以了

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\FipsAlgorithmPolicy\Enabled 

原文：http://www.cnblogs.com/xuan52rock/p/5859682.html