什么导致ArgumentOutOfRangeException打开SqlConnection.打开()?

写一个简单的C#ADO.NET应用程序连接到我的数据库和管理我的网站项目条目,我遇到了一个奇怪的问题,我找不到任何有关的信息。我已经验证了MySQL服务器正在接受远程连接,监听端口3306,提供的用户名有效,密码有效,主机名解析正确。但是,什么时候 SqlConnection.Open 被调用时,我收到一个荒谬的异常。

System.ArgumentOutOfRangeException异常未处理

需要非负数。

参数名称:count

下面是调用上述错误的代码,特别是调用 m_ActiveConnection.Open()

static public void OpenConnection(CConnectionDescription ConnectionDescription)
{
    try
    {
        SqlConnectionStringBuilder ConnectionStringBuilder = new SqlConnectionStringBuilder();
        ConnectionStringBuilder.DataSource = ConnectionDescription.Address + "," + ConnectionDescription.PortNumber;
        ConnectionStringBuilder.UserID = ConnectionDescription.UserName;
        ConnectionStringBuilder.Password = ConnectionDescription.Password;
        ConnectionStringBuilder.NetworkLibrary = "DBMSSOCN";

        if (m_ActiveConnection != null)
        {
            if (m_ActiveConnection.State != System.Data.ConnectionState.Closed)
            {
                m_ActiveConnection.Close();
            }
            m_ActiveConnection.ConnectionString = ConnectionStringBuilder.ConnectionString;
        }
        else
        {
            m_ActiveConnection = new SqlConnection(ConnectionStringBuilder.ConnectionString);
        }
        m_ActiveConnection.Open();
        m_ActiveConnectionDescription = ConnectionDescription;

        if (ConnectionChanged != null)
        {
            ConnectionChanged();
        }
    }
    finally
    {
        // Error message
    }
}

CConnectionDescription 我自己。任何帮助都将不胜感激。