C# SQLConnection.Open()挂起，无一例外

using System;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;Connect Timeout=60;";
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            try
            {
                connection.Open();
                Console.WriteLine("Connection opened successfully.");
            }
            catch (SqlException ex)
            {
                Console.WriteLine("Failed to open connection: " + ex.Message);
            }
            finally
            {
                if (connection.State == System.Data.ConnectionState.Open)
                {
                    connection.Close();
                    Console.WriteLine("Connection closed.");
                }
            }
        }
    }
}