NetCore mysql Connection open error . The given key ‘25971‘ was not present in the dictionary

在内网机器上发布NetCore 服务，链接mysql发现一直报“The given key was not present in the dictionary”的错误，查了半天资料结果是因为连接字符串未定义字符编码格式，把charset=utf8添加到原连接字符串后，问题就解决了，链接如下：

"ConnectionString": "server=127.0.0.1;Database=xxx;Port=3306;Uid=xxx;Pwd=xxxx;Persist Security Info=True;SslMode=None;charset=utf8mb4;"

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NetCore mysql Connection open error . The given key ‘25971‘ was not present in the dictionary

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