Before version 17.1.0.32 (2018 Volume 1), Syncfusion published NuGet packages on its own feed, which allowed many developers to use the libraries without explicit licensing. Today, all Syncfusion packages are distributed through nuget.org and contain evaluation assemblies. The license key is used at runtime to validate that your application is properly licensed. If you do not register a valid license key, you will see a warning message similar to:
From the left-hand navigation menu or the main dashboard layout, click on . Select Downloads & Keys from the dropdown or sub-menu. Step 3: Configure Key Details syncfusion generate license key
In a Blazor Web App with interactive server and WebAssembly modes, you need to register the license key in (the .Client project) in their respective Program.cs files. Before version 17