In your Program.cs file, register the license key before building the application:
The process is straightforward and managed entirely through the Syncfusion website.
: A string that must be registered directly in your application code to prevent licensing warnings or watermarks from appearing at runtime. How to Generate a Syncfusion Unlock Key syncfusion unlock key
For cross-platform mobile apps, register the key in the application startup class, usually found in App.xaml.cs .
Once you generate a license key for a specific Syncfusion version, that key remains valid indefinitely for that version. You can continue to use the key with that specific version without any issues, even after your subscription ends. In your Program
The registration process requires adding a single line of code before initializing any Syncfusion components. This is typically done in the global startup file of your application (such as Program.cs , App.xaml.cs , or main.dart ).
There is no single registry value you can toggle. Older cracks that patched Syncfusion.Core.dll are quickly broken by monthly updates and are often laced with malware. Once you generate a license key for a
: You must generate a key specifically for the platform you are developing on, such as ASP.NET Core, Flutter, or Blazor. No "Call Home"
Syncfusion subscriptions are annual. If your maintenance renewal has lapsed, the unlock key will expire. Fix: Renew your subscription. Alternatively, you can continue using the last version released before your expiry date, but you will need to reinstall that specific version and use the key that was valid at that time.
Think of the unlock key as a key that opens the installer "door" during the initial setup. It does not interact with your application code in any way. Unlock keys are platform- and version-specific, meaning you need the correct key for each product and release.