Syncfusion requires developer registration for its components starting from version 16.2.0.xxxx. The trial license key error usually occurs due to one of four common reasons:
using Syncfusion.Licensing; var builder = WebApplication.CreateBuilder(args); // Register Syncfusion License SyncfusionLicenseProvider.RegisterLicense("YOUR_GENERATED_LICENSE_KEY_HERE"); var app = builder.Build(); Use code with caution. For .NET MAUI / Xamarin.Forms
static void Main()
If the basic fix didn’t work, you are in one of these edge cases.
Manually delete the bin and obj folders in your project directory. syncfusion trial license key fix
Place this code in your Program.cs , Startup.cs , or App.xaml.cs :
Hardcoding license keys directly into your source code poses a security risk and complicates version upgrades. Use these enterprise-level management strategies instead: Use Environment Variables Manually delete the bin and obj folders in
If the "Trial" message persists after adding the key, your environment is likely caching the old state. folders (for .NET) or the node_modules/.cache folder (for JS frameworks). Clean and Rebuild the solution. Hard Refresh your browser (Ctrl + F5). Syncfusion 4. Common Troubleshooting Whitespace:
Choose the exact and Version matching your installed NuGet/NPM packages. Step 2: Register the Key Before Initializing UI Components folders (for