Use V2.x Package Garden Licensing

gistfile1.txt

 public sealed class ProductLicense
    {
        private readonly IHostingEnvironment _hostingEnvironment;
        private readonly IHttpContextAccessor _contextAccessor;
        private readonly ILogger<ProductLicense> _logger;

        public ProductLicense(IHostingEnvironment hostingEnvironment, IHttpContextAccessor contextAccessor, ILogger<ProductLicense> logger)
        {
            _hostingEnvironment = hostingEnvironment;
            _contextAccessor = contextAccessor;
            _logger = logger;
        }

        private static Validator _validator;

        private static readonly object _lock = new object();

        //Change this to your own contact information. This message will be used in exceptions
        private const string LicenseSupportInfo =
            "Please contact Soeteman Software support on support@soetemansoftware.nl";

        //The productkey generated by the license generator package
        private const string ProductKey =
            "My secret product key goes here";

        //The productParameters generated by the license generator package
        private const string ProductParameters =
            "My secret parameters go here";

        //The major version of the package
        private const int ProductVersion = 9;

        //The path to the license file
        public const string LicensefilePaths = "/bin/cmsimport.lic,/umbraco/Licenses/cmsimport.lic";

        /// <summary>
        /// Singleton instance to the validator
        /// </summary>
        public Validator Instance
        {
            get
            {
                lock (_lock)
                {
                    if (_validator == null)
                    {
                        var file = FindFile();
                        using (var fs = File.Exists(file) ? File.OpenRead(file) : FileStream.Null)
                        {
                            _validator = new Validator(_contextAccessor, ProductParameters, ProductKey, fs,
                                LicenseSupportInfo, ProductVersion);
                            return _validator;
                        }
                    }
                    return _validator;
                }
            }
        }

        private string FindFile()
        {
            var file = string.Empty;
            foreach (var licensefilePath in LicensefilePaths.Split(','))
            {
                file = _hostingEnvironment.MapPathContentRoot(licensefilePath);
                _logger.LogDebug($"Looking for a license at {file}");

                if (File.Exists(file))
                {
                    //License file is found in location
                    return file;
                }
            }

            return file;
        }
    }