Mysql: Authentication with old password no longer supported, use 4.1 style password

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visual studio: 2012

MySql.Data: Version=6.9.4.0

问题描述：

连接msql connection时抛出异常：

Authentication with old password no longer supported, use 4.1 style password.

原因：

mysql 版本较老，而MySql.Data版本较新使用了新的密码验证方式

解决办法：

换成较老的MySql.Data: Version=6.5.4.0

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