When you upgrade system,and the old kernal will not automatic uninstall,you can manual uninstall it,the command is:
sudo apt-get installl aptitude
sudo aptitude purge ~ilinux-p_w_picpath-.*\(\!`uname ...
How to remove the .NET Core Runtime and SDK
https://docs.microsoft.com/en-us/dotnet/core/versions/remove-runtime-sdk-versions?tabs=windows
Over time, as you install updated versions of the .NET Core ...
从这个版本开始，httpclient的api发生了一次重大调整。主要包括如下：Release 4.3 Final
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This is the first stable (GA) release of HttpClient 4.3. The most notable enhancements included...
