CasOwa.CasOwaAuthHandler.CasOwaAuthHandler C# (CSharp) Метод

        static CasOwaAuthHandler()
        {
            XmlConfigurator.Configure();
            log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

            ClearPassUrl = ConfigurationManager.AppSettings.Get("CasOwa.ClearPassUrl");
            if (String.IsNullOrEmpty(ClearPassUrl))
            {

                Exception ex = new ConfigurationErrorsException("ClearPassUrl is missing. It must be set in <appSettings> section of <web.conf>.  Example: <add key=\"ClearPassUrl\" value=\"https://cashostname/cas/clearPass\"/>");
                if (log.IsErrorEnabled)
                    log.Error(ex.Message, ex);
                throw ex;
            }

            try
            {
                ClearPassUri = new Uri(ClearPassUrl);
            }
            catch (UriFormatException ufe)
            {
                Exception ex = new ConfigurationErrorsException("ClearPassUrl is invalid.  Check your settings in <appSettings> section of <web.conf>. " + ufe.Message, ufe);
                if (log.IsErrorEnabled)
                    log.Error(ex.Message, ex);
                throw ex;
            }

            ArtifactParameterName = ConfigurationManager.AppSettings.Get("CasOwa.ArtifactParameterName") ?? ArtifactParameterName;
            ServiceParameterName = ConfigurationManager.AppSettings.Get("CasOwa.ServiceParameterName") ?? ServiceParameterName;

            OwaUrl = ConfigurationManager.AppSettings.Get("CasOwa.OwaUrl");
            if (String.IsNullOrEmpty(OwaUrl))
            {
                Exception ex = new ConfigurationErrorsException("CasOwa.OwaUrl is missing. It must be set in <appSettings> section of <web.conf>.  Example: <add key=\"CasOwa.OwaAuthUrl\" value=\"https://exchangehostname/owa\"/>");
                if (log.IsErrorEnabled)
                    log.Error(ex.Message, ex);
                throw ex;
            }

            OwaAuthPath = ConfigurationManager.AppSettings.Get("CasOwa.OwaAuthPath") ?? OwaAuthPath;
            OwaAuthUrl = OwaUrl + OwaAuthPath;

            OwaOptionalFormFields = ConfigurationManager.AppSettings.Get("CasOwa.OwaOptionalFormFields") ?? OwaOptionalFormFields;

            OwaInboxUrl = ConfigurationManager.AppSettings.Get("CasOwa.OwaInboxUrl");

            // This is setting is necessary when using untrusted certificates, typically in a development or testing.
            var skipOwaUrlCertificateValidation = ConfigurationManager.AppSettings.Get("CasOwa.skipOwaUrlCertificateValidation");
            if (!String.IsNullOrEmpty(skipOwaUrlCertificateValidation) && bool.Parse(skipOwaUrlCertificateValidation))
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(delegate { return true; });
        }