using the tools named "security-code-scan" to scan the solution ccode has found the security error SCS0005(Weak random number generator). this cs file and position list :

1. libs\common\Generator.cs (24,13)
2. libs\server\Objects\Set\SetObjectImpl.cs (181,37)、(193,33):
3. libs\server\Objects\Hash\HashObjectImpl.cs (273,46)、(275,60)、(299,33)
4. libs\server\Objects\SortedSet\SortedSetObjectImpl.cs (683,38)、(686,52)
5. other test/benchmark/playground files.