Register Syncfusion license key in a WinUI application

17 Jul 20261 minute to read

The generated license key is just a string that needs to be registered before any Syncfusion control is initiated. The following code is used to register the license.

Registering a single license key

C#

Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY");

Registering multiple license keys

You can register multiple license keys using either a comma (,) or a semicolon (;) as the separator between keys.

C#

Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY_1,YOUR LICENSE KEY_2,...");

or

C#

Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY_1;YOUR LICENSE KEY_2;...");

NOTE

• Place the license key between double quotes. Also, ensure that Syncfusion.Licensing.dll is referenced in your project where the license key is being registered.
• Syncfusion license validation is done offline during application execution and does not require internet access. Apps registered with a Syncfusion license key can be deployed on any system that does not have an internet connection.

IMPORTANT

Syncfusion license keys can be validated during the Continuous Integration (CI) processes to ensure proper licensing and prevent licensing errors during deployment. Refer to the CI License Validation section for detailed instructions on how to implement it.

WinUI

You can register the license key in App constructor of App.xaml.cs in C#. If App constructor not available in App.xaml.cs, create the “App()” constructor in App.xaml.cs and register the license key inside the constructor. In Visual Basic, register the license code in App.xaml.vb.

C#

public partial class App : Application
{
	public App()
	{
		//Register Syncfusion license
		Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY");
	}	
}