License keys need to be updated in two primary scenarios: moving from a trial to a paid license, and upgrading to a new major version.
Place the registration code in your startup file ( Program.cs or App.xaml.cs ) before Builder.Build() is called.
Follow these steps to smoothly update (UPD) your license infrastructure: 1. Check Your Exact Package Version
To generate a Syncfusion license key, you must access the page of your Syncfusion account dashboard . Starting from version 31.1.17 (2025 Volume 3) , Syncfusion transitioned to an edition-based licensing model where keys are generated for specific software suites rather than individual platforms. Steps to Generate a License Key For the latest versions ( v31.1.17 or higher ): Log in to your Syncfusion account . syncfusion generate license key upd
Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY");
This is the most common error. It occurs when the license key version does not match the NuGet package version. Ensure the first two digits of your key (e.g., 25.x) match the first two digits of your Syncfusion NuGet packages.
Syncfusion is a popular .NET and JavaScript component library used for building robust and feature-rich web, mobile, and desktop applications. To use Syncfusion components in your projects, you need to obtain a valid license key. License keys need to be updated in two
: Individual developers and small companies may qualify for a free Community License
: Under the "License and Downloads" section, find the "Downloads & Keys" page.
Ensure you aren't using a key generated for a different platform (e.g., using a Xamarin key in a Blazor project). Use an "Extension" or "Enterprise" suite key if you target multiple platforms. The Licensing Banner Still Appears After Updating Check Your Exact Package Version To generate a
Syncfusion offers a massive suite of UI components and file format libraries for web, mobile, and desktop platforms. To use these components without seeing a runtime license warning banner, you must register a valid license key in your application.
Replace the placeholder with the new key you generated. Save the file.
You are using a newer version of Syncfusion DLLs than your license key supports. Solution: