// AMS.Properties.Settings.ams_roumpasConnectionString = "test" by default in config

​

​

public Login() {

        RunAsync(user, pass, guid).Wait(); // <---- Exception thrown: 'System.AggregateException' in mscorlib.dll ("One or more errors occurred.")

}

​

        static async Task RunAsync(string user , string pw , string guid)

        {

            using (var client = new HttpClient())

            {          

                client.BaseAddress = new Uri("https://***/api/");

                client.DefaultRequestHeaders.Accept.Clear();

                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                HttpResponseMessage response = await client.GetAsync(string.Format("gs/{0}/{1}/{2}", user, pw, guid)).ConfigureAwait(false);

                if (response.IsSuccessStatusCode)

                {

                    getin = true;

                    string jsonInput = await response.Content.ReadAsStringAsync();

                    JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();

                    RootObject objCustomer = jsonSerializer.Deserialize<RootObject>(jsonInput);

                    _conn = objCustomer.Client[0].constring;

                    var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

                    var connectionStringsSection = (ConnectionStringsSection)config.GetSection("connectionStrings");

                    connectionStringsSection.ConnectionStrings["AMS.Properties.Settings.ams_roumpasConnectionString"].ConnectionString = objCustomer.Client[0].constring;

                    config.Save(ConfigurationSaveMode.Full, true);

                    ConfigurationManager.RefreshSection("connectionStrings");

                    ConfigurationManager.RefreshSection("configSections");                   

                    ams_DataSetTableAdapters.AppointmentsTableAdapter aa = new ams_DataSetTableAdapters.AppointmentsTableAdapter();

                    aa.Connection.ConnectionString = objCustomer.Client[0].constring;

                    if (aa.Connection.State != System.Data.ConnectionState.Closed)

                    {

                        aa.Connection.Close();

                    }

                    aa.Connection.Open(); 

                    setupdated = Convert.ToDateTime(objCustomer.Client[0].setupdate);

                    expireddated = Convert.ToDateTime(objCustomer.Client[0].expired);

                }

                else

                {

                    client.Dispose();

                    getin = false;

                }

            }

        }

​

​

​

​

        // dataset.designer

        private void InitConnection() {

            this._connection = new global::MySql.Data.MySqlClient.MySqlConnection();

            this._connection.ConnectionString = global::AMS.Properties.Settings.Default.ams_roumpasConnectionString;  // <--- Exception thrown: 'System.ArgumentException' in System.Data.dll ("Format of the initialization string does not conform to specification starting at index 0.")

        }