mysql数据库.net如何连接,.net core怎么连接MySql

刚刚学习.net core2，用dapper+mysql操作数据库，但是一直连不上去，提示“ArgumentException: Format of the initialization string does not conform to specification starting at index 0.”，不知道什么原因，只配置了appseting.json：，后台代码是这样写的：

"ConnectionStrings": {

"DefaultConnection": "server=locahostl;post=3306;database=blog;user=root;password=123456"

},

public static MySqlConnection GetConnection()

{

using (MySqlConnection conn = new MySqlConnection("DefaultConnection"))

{

conn.Open();

return conn;

}

}