Ironpdf License Key -

License.LicenseKey = licenseKey;

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. ironpdf license key

Switch to the modern License.LicenseKey = "..." method. If you must use a license file, ensure the file path is correct. Part 7: Best Practices for Managing IronPDF License Keys Do Not Hardcode Keys in Source Control Never commit your license key to public repositories (GitHub, GitLab). Use secrets managers or environment variables . Rotate Keys Periodically If a developer leaves your team, you can invalidate their key from the Iron Software account portal and generate a new one. Separate Development and Production Keys You can generate multiple license keys under one account. Use a trial key for local development and your paid key for staging/production. This prevents accidental leakage of your production key. Automate Validation in CI/CD Pipelines In GitHub Actions or Azure DevOps, store your license key as a secret and inject it at runtime: License

string key = config["IronPdf:LicenseKey"]; IronPdf.License.LicenseKey = key; Part 7: Best Practices for Managing IronPDF License