Workaround for PlatformNotSupportedException on linux with .net core 2.1#139

cnblogs-dudu merged 1 commit intomastercnblogs/EnyimMemcachedCore:masterfrom

hotfix/138-PlatformNotSupportedExceptioncnblogs/EnyimMemcachedCore:hotfix/138-PlatformNotSupportedExceptionCopy head branch name to clipboard