Recopy the key cleanly into a plain text editor before pasting it into your code. To help narrow down the exact issue, could you tell me:
If the licensing warning persists after adding the code, your build environment is caching old configurations. Clear the cache using these steps:
How to Fix Syncfusion Trial License Key Errors: A Complete Troubleshooting Guide
What of the Syncfusion NuGet package is installed?
: The registration method is placed in the wrong file or executed too late in the application lifecycle. syncfusion trial license key fix
Place this code in your Program.cs , Startup.cs , or App.xaml.cs :
Clean and rebuild
: The license key generated in your Syncfusion dashboard does not match the exact version of the NuGet packages installed in your project.
// Add this before builder.Build() Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR_ACTUAL_LICENSE_KEY_HERE"); Use code with caution. For ASP.NET MVC / WebForms Recopy the key cleanly into a plain text
A: The application will still run, but the licensing error popup will appear every time, and your components will display a trial watermark.
Open your Program.cs file and add the registration method before builder.Build() :
Verify these three conditions if you still see a trial banner:
Syncfusion Trial License Key Fix: Troubleshooting and Best Practices : The registration method is placed in the
You must register the license key programmatically before initialization of any Syncfusion components. Here is where and how to place the registration code across major platforms. Blazor (Server and WebAssembly)
Before diving into fixes, it's crucial to understand exactly what your error message is trying to tell you. Syncfusion uses a few standard error messages that point to the root cause of the problem. We'll categorize them into primary alerts and advanced, more specific failures.
What are you using? (e.g., Blazor, MAUI, ASP.NET Core) What version of Syncfusion packages do you have installed?