ngagunakeun System; ngagunakeun System.Net; kelas TrialValidation {private static string serverUrl = "https://example.com/validate.php"; public static bool IsTrialValid() { try { using (var client = new WebClient()) { string response = client.DownloadString(serverUrl); DateTime trialEndDate = DateTime.Parse(response); if (DateTime.Now trialEndDate) { return true; } } catch (Exception ex) { // handle any exceptions here } return false; } } In this example, we use a server-based validation system to validate the trial period of the add-in. The IsTrialValid) method returns a request to a PHP script hosted on a remote test server, which sends the test date of the validity of the current test
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