The Entity Framework provider type 'MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.EntityFramework, Version=8.0.18.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' registered in the application config file for the ADO.NET provider with invariant name 'MySql.Data.MySqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.
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項目運行目錄下缺少文件“MySql.Data.EntityFramework.dll”，從官網https://downloads.mysql.com/archives/c-net/，下載“MySQL Connector/NET (Archived Versions)”安裝包，注意對齊當前mysql版本。下載安裝后，在安裝目錄下找到MySql.Data.EntityFramework.dll，拷貝到程序目錄下即可。
