如何连接安装了ssl证书的mysql？

Question

Data Source=rm-wz9yj5x8e1***;

Initial Catalog=***;

user id=***;

password=***;

Convert Zero Datetime=True;

CertificateFile=E:\mysqlssl\ApsaraDB-CA-Chain\ApsaraDB-CA-Chain.pem;

CertificatePassword=***;

SslMode=Required;

报错  An error occurred accessing the database. This usually means that the connection to the database failed. Check that the connection string is correct and that the appropriate DbContext constructor is being used to specify it or find it in the application's config file. See http://go.microsoft.com/fwlink/?LinkId=386386 for information on DbContext and connections. See the inner exception for details of the failure.

数据库用的是阿里云的ssl证书 RDS mysql数据库，阿里云下载证书包含pem、p7b、jks三种格式,只读账号不需要ssl证书，测试可以连接，读写账号需要ssl证书以上是证书连接方式。请较各位大神，求解