Key Fix __link__ | Syncfusion Trial License
Add the following line of code in your application's entry point (e.g., Main() in Program.cs or ConfigureServices in Startup.cs ), before any Syncfusion controls are initialized.
// Program.cs using Syncfusion.Blazor; using Syncfusion.Licensing; var builder = WebApplication.CreateBuilder(args); // Register license key SyncfusionLicenseProvider.RegisterLicense("YOUR_ACTUAL_LICENSE_KEY_HERE"); builder.Services.AddSyncfusionBlazor(); Use code with caution. ASP.NET MVC (.NET Framework)
: Check your package.json or NuGet references. If your packages are v27.1.x , your license key must be generated specifically for v27.1.x . syncfusion trial license key fix
Check package properties; generate a new key specifying that exact version. Trial key has expired.
The registered key belongs to a different Syncfusion version than the NuGet packages installed in the project. Add the following line of code in your
: Open your NuGet Package Manager and look at the exact version number of your Syncfusion packages (e.g., 25.1.39 ).
Register the key in the Main method of your Program.cs or App.xaml.cs file, before InitializeComponent or Run . Common Fixes for "Syncfusion License Not Working" If your packages are v27
How to Fix Syncfusion Trial License Key Errors: A Complete Troubleshooting Guide
string licenseKey = Environment.GetEnvironmentVariable("SYNCFUSION_LICENSE_KEY"); Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense(licenseKey); Use code with caution. To help narrow down your specific error, tell me:
This is the universal that works for every project type.
This is the #1 reason the "fix" fails. If you updated your NuGet packages but kept an old license key, the warning will persist. Always refresh your key in the Syncfusion License & Downloads portal after an upgrade.
