.net core 2.2发布后支持System.Drawing.Common绘图，可以做一些图片验证码之类的功能，应用程序在Windows上运行功能正常，但是部署到centos上就会报错：
System.TypeInitializationException: The type initializer for 'System.DrawingCore.GDIPlus' threw an exception. ---> System.DllNotFoundException: Unable to load shared library 'gdiplus' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libgdiplus: cannot open shared object file: No such file or directory
解决办法：
centos上安装libgdiplus-devel；
命令如下：yum install libgdiplus-devel
安装完成后重启 .net core 服务 OK！