// Validate if (License.IsValidLicense()) { Console.WriteLine("IronPDF license successfully activated!"); var info = License.GetLicenseInfo(); Console.WriteLine($"Licensee: {info.Licensee}"); Console.WriteLine($"Expires: {info.ExpirationDate?.ToShortDateString() ?? "Perpetual"}"); } else { Console.WriteLine("Invalid license key. PDF generation will fail."); return; }

- name: Run IronPDF Tests env: IRONPDF_LICENSE: ${{ secrets.IRONPDF_LICENSE }} run: dotnet test Add this to your application startup logs: ironpdf license key

Upgrade your license at ironpdf.com/upgrade . Error 4: "Too many activations" / "License usage exceeded" Cause: You have exceeded the number of allowed developers or machines. A Single Developer license allows one named developer but unlimited deploys to servers. However, simultaneous usage from multiple developer machines triggers this. // Validate if (License

Ironpdf License Key < 2026 Update >

// Validate if (License.IsValidLicense()) { Console.WriteLine("IronPDF license successfully activated!"); var info = License.GetLicenseInfo(); Console.WriteLine($"Licensee: {info.Licensee}"); Console.WriteLine($"Expires: {info.ExpirationDate?.ToShortDateString() ?? "Perpetual"}"); } else { Console.WriteLine("Invalid license key. PDF generation will fail."); return; }

- name: Run IronPDF Tests env: IRONPDF_LICENSE: ${{ secrets.IRONPDF_LICENSE }} run: dotnet test Add this to your application startup logs:

Upgrade your license at ironpdf.com/upgrade . Error 4: "Too many activations" / "License usage exceeded" Cause: You have exceeded the number of allowed developers or machines. A Single Developer license allows one named developer but unlimited deploys to servers. However, simultaneous usage from multiple developer machines triggers this.