Select the specific Platform and Version that matches the NuGet packages in your project (e.g., v25.1.xx). Copy the generated string. Step 2: Where to Place the Fix (By Platform)
Hardcoding keys in source control can cause failures if different environments pull different package updates.
// Add this at the very beginning of Program.cs Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_ACTUAL_LICENSE_KEY_HERE"); Use code with caution. .NET MAUI / Xamarin.Forms
The Community License is and never expires for your qualifying projects. It’s not a trial. It’s the real product, legally free. syncfusion trial license key fix
: If an error persists after updating your key, delete the bin and obj folders and rebuild the project. For web projects, delete node_modules and the package-lock.json file, then run npm install .
Sometimes old build artifacts keep the trial banner alive. Clean your solution, delete the bin and obj folders, and rebuild.
If your current key is failing, follow these steps to get a fresh one: Log into your account on the Syncfusion website Navigate to the Trial & Downloads Select the Get License Key option for your active trial. Carefully select the from the dropdowns to match your project's environment. The "Community License" Alternative Select the specific Platform and Version that matches
This is where 80% of developers get stuck. Your local registry has the key, but your build agent does not.
"Syncfusion license key not found." "Trial permission has expired." "Invalid license key. Please register a valid license key."
License keys are . If you upgraded your NuGet packages but are using an old key, the trial warning will persist. Log in to the Syncfusion License & Downloads section. // Add this at the very beginning of Program
Here’s a step-by-step guide to resolve common issues, ensuring your evaluation works without “license key not found” or expiration errors.
USD revenue), you qualify for the . This provides a free, perpetual license key that does not expire every 30 days like the trial, effectively fixing the expiration warning forever.
// Add this before builder.Build() Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_ACTUAL_LICENSE_KEY_HERE"); Use code with caution. For ASP.NET MVC / WebForms
The most critical part of the fix is registering your license key correctly. The key must be registered in your application.
What are you building for (e.g., Blazor, MAUI, ASP.NET Core)?