问超时已过期。在Azure sql上的操作完成之前已过超时时间

EN

Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.  This failure occurred while attempting to connect to the routing destination. The duration spent while attempting to connect to the original server was - [Pre-Login] initialization=296; handshake=324; [Login] initialization=0; authentication=1; [Post-Login] complete=94;

   private void SetupSSM() {
            SqlConnectionStringBuilder connStrBldr = new SqlConnectionStringBuilder
            {
                UserID = SettingsHelper.AzureUsernamedb,
                Password = SettingsHelper.AzurePasswordDb,
                ApplicationName = SettingsHelper.AzureApplicationName,
                DataSource = SettingsHelper.AzureSqlServer
            };

            bool created=DbUtils.CreateDatabaseIfNotExists(connStrBldr.ConnectionString, SettingsHelper.Azureshardmapmgrdb);
            if(created)
            {
                Sharding sharding = new Sharding(SettingsHelper.AzureSqlServer, SettingsHelper.Azureshardmapmgrdb, connStrBldr.ConnectionString);
            }
        }



  public static bool CreateDatabaseIfNotExists(string connectionString, string databaseName)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();

                SqlCommand cmd = new SqlCommand(
                    string.Format("SELECT * FROM sys.databases WHERE [name]=\'{0:S}\'", databaseName),
                    conn);

                if (cmd.ExecuteScalar() == null)
                {
                    SqlCommand cmd2 = new SqlCommand(
                        string.Format("CREATE DATABASE [{0:S}];", databaseName),
                        conn);

                    cmd2.ExecuteNonQuery();

                    return true;
                }
                else
                    return false;
            }
        }