NServiceBus.LicenseManager.InitializeLicense C# (CSharp) Method

        internal void InitializeLicense(string licenseText)
        {
            //only do this if not been configured by the fluent API
            if (licenseText == null)
            {
                licenseText = GetExistingLicense();
            }

            if (string.IsNullOrWhiteSpace(licenseText))
            {
                license = GetTrialLicense();
                PromptUserForLicenseIfTrialHasExpired();
                return;
            }

            LicenseVerifier.Verify(licenseText);

            var foundLicense = LicenseDeserializer.Deserialize(licenseText);

            if (LicenseExpirationChecker.HasLicenseExpired(foundLicense))
            {
                // If the found license is a trial license then it is actually a extended trial license not a locally generated trial.
                // Set the property to indicate that it is an extended license as it's not set by the license generation 
                if (foundLicense.IsTrialLicense)
                {
                    foundLicense.IsExtendedTrial = true;
                    PromptUserForLicenseIfTrialHasExpired();
                    return;
                }
                Logger.Fatal("Your license has expired! You can renew it at https://particular.net/licensing.");
                return;
            }

            if (foundLicense.UpgradeProtectionExpiration != null)
            {
                Logger.InfoFormat("License upgrade protection expires on: {0}", foundLicense.UpgradeProtectionExpiration);
            }
            else
            {
                Logger.InfoFormat("License expires on {0}", foundLicense.ExpirationDate);
            }

            license = foundLicense;
        }