你需要为MySql引用DLL，阅读以下内容：

如何为.NET的MySQL连接器添加引用？ - 堆栈溢出 [ ^ ]

使用VB.NET连接到MySQL - VB.NET教程| Dream.In.Code [ ^ ]

使用MySQLConnector在ASP.Net应用程序中使用并连接MySQL数据库 [ ^ ]

You need to reference the DLL for MySql, read the following :
How do I add a reference to the MySQL connector for .NET? - Stack Overflow[^]
Use VB.NET To Connect To MySQL - VB.NET Tutorials | Dream.In.Code[^]
Use and connect to MySQL Database in ASP.Net Application using MySQLConnector[^]