使用示例代码：

public async void SQLInsert()
        {
            string connStr = "Server=echstreme.de;User=c1Look;Database=c1Look;Port=3306;Password=redacted;";
            MySqlConnection conn = new MySqlConnection(connStr);
            try
            {
                await SendEmbedMessage("MySQL", "Attempting to connect to database");
                conn.Open();
                await SendEmbedMessage("MySQL", "Connection to Database Successful");
                MySqlCommand cmd = new MySqlCommand(sqlQuery, conn);
                cmd.ExecuteNonQuery();

                conn.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }

报错信息：

MySql.Data.MySqlClient.MySqlException (0x80004005): SSL Connection error.
 ---> System.AggregateException: One or more errors occurred. (The handshake failed due to an unexpected packet format.)
 ---> System.IO.IOException: The handshake failed due to an unexpected packet format.
   at System.Net.Security.SslStream.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.PartialFrameCallback(AsyncProtocolRequest asyncRequest)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Security.SslStream.ThrowIfExceptional()
   at System.Net.Security.SslStream.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Net.Security.SslStream.EndProcessAuthentication(IAsyncResult result)
   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__64_2(IAsyncResult iar)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at MySql.Data.Common.Ssl.StartSSL(Stream& baseStream, Encoding encoding, String connectionString)
   at MySql.Data.Common.Ssl.StartSSL(Stream& baseStream, Encoding encoding, String connectionString)
   at MySql.Data.MySqlClient.NativeDriver.Open()
   at MySql.Data.MySqlClient.Driver.Open()
   at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)
   at MySql.Data.MySqlClient.MySqlPool.CreateNewPooledConnection()
   at MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
   at MySql.Data.MySqlClient.MySqlPool.TryToGetDriver()
   at MySql.Data.MySqlClient.MySqlPool.GetConnection()
   at MySql.Data.MySqlClient.MySqlConnection.Open()
   at Bot.Admins.AdminCommands.SQLInsert() in C:\Users\Owner\source\repos\Bot\Bot\Admins\AdminCommands.cs:line 71

解决方法：

如果服务器不支持SSL，可以使用SSL模式选项，None或Required。

连接字符串需要这样写：

"Server=echstreme.de;User=c1Look;Database=c1Look;Port=3306;Password=redacted;SSL Mode=None"