internal class Program
{
    static void Main(string[] args)
    {
        RegisterManagedResourceWithExistenceCheck();
    }
 
    public static void RegisterManagedResourceWithExistenceCheck()
    {
        try
        {
            LicensingManagement.Instance.RegisterManagedResourceWithExistenceCheck("QuickOPC", "Multipurpose",
                Assembly.GetCallingAssembly(),
                "OpcLabTest.Key-Permanent-WebForm-XXX.txt");
        }
        catch (CustomException customException)
        {
            Console.WriteLine($"*** Failure: {customException.Message}");
            return;
        }
 
        var client = new EasyDAClient();
        long serialNumber = (uint)client.LicenseInfo["Multipurpose.SerialNumber"];
        Console.WriteLine("SerialNumber: {0}", serialNumber);
    }
}

var licenseResource = "MyProject.Key-Permanent-WebForm-XXXXXX-20210913.txt";
 LicensingManagement.Instance.RegisterManagedResourceWithExistenceCheck("QuickOPC", "Multipurpose", Assembly.GetExecutingAssembly(), licenseResource);

OpcLabs.BaseLib.Licensing.LicensingException: Not allowed to run by the license "Multipurpose". You might be running a trial license, and the version of the software you are using is obsolete. To resolve this problem, a) obtain a recent version, or b) ask for an evaluation license key, or c) install a license valid for the current version.
Product information follows. Component name: "QuickOPC", license IDs: "Multipurpose", version number: 563, release date: 3/21/2022, trial validity: 397 days, option expression: "EasyDAClient".
Context: 0 dropped license(s).

{"Multipurpose.ID":"Multipurpose","Multipurpose.SerialNumber":1111111120,"Multipurpose.SubjectName":"*","Multipurpose.IssuerName":"OPC Labs","Multipurpose.NotBefore":"1601-01-01T00:00:00Z","Multipurpose.NotAfter":"1601-01-01T00:00:00Z","Multipurpose.RunTimeLimit":"00:30:00","Multipurpose.RunOnServer":1,"Multipurpose.AllPurposeStations":1,"Multipurpose.ExtraRuntimeStations":0,"Multipurpose.Type":"Trial License","Multipurpose.CallerRestrictions":[],"Multipurpose.Hidden":1,"Multipurpose.OptionRestrictions":["+StreamInsight"],"Multipurpose.PlatformRestrictions":[],"Multipurpose.ReleaseDateCovered":"1601-01-01T00:00:00Z","Multipurpose.VersionNumberCovered":563,"Multipurpose.DegradeDate":"2023-04-22T00:00:00Z","Multipurpose.IsEvaluation":1}