Register Syncfusion License key in WPF application

27 Jun 20221 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.

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


  • 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.


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.

public partial class App : Application
	public App()
		//Register Syncfusion license
		Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY");
Private Sub New()
	'Register Syncfusion License
	Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY")
End Sub