private void TestServerConnection() { const string connectionTestCaption = "Test settings"; try { StringBuilder errorMessageBuilder = new StringBuilder(); if (!ValidateCalendarUrl (errorMessageBuilder)) { MessageBox.Show (errorMessageBuilder.ToString(), "The calendar Url is invalid", MessageBoxButtons.OK, MessageBoxIcon.Error); return; } var dataAccess = new CalDavDataAccess ( new Uri (_calenderUrlTextBox.Text), new CalDavWebClient ( _userNameTextBox.Text, _passwordTextBox.Text, TimeSpan.Parse (ConfigurationManager.AppSettings["calDavConnectTimeout"]), TimeSpan.Parse (ConfigurationManager.AppSettings["calDavReadWriteTimeout"]), Boolean.Parse (ConfigurationManager.AppSettings["disableCertificateValidation"]), Boolean.Parse (ConfigurationManager.AppSettings["enableSsl3"]), Boolean.Parse (ConfigurationManager.AppSettings["enableTls12"])) ); if (!dataAccess.IsCalendarAccessSupported()) MessageBox.Show ("The specified Url does not support calendar access!", connectionTestCaption); if (!dataAccess.IsResourceCalender()) MessageBox.Show ("The specified Url is not a calendar!", connectionTestCaption); if (!dataAccess.IsWriteableCalender()) MessageBox.Show ("The specified Url is a read-only calendar!", connectionTestCaption); if (!dataAccess.DoesSupportCalendarQuery ()) MessageBox.Show ("The specified Url does not support Calendar Queries!", connectionTestCaption); MessageBox.Show ("Connection test successful.", connectionTestCaption); } catch (Exception x) { MessageBox.Show (x.Message, connectionTestCaption); } }