Portable.Licensing examples for Visual Basic .NET (1 comment)

Added by Daniel Nauck over 4 years ago

Thorsten Weiß and Fabian Deitelhoff ported the C# example from the dotnetpro article to Visual Basic .NET and published it on github:

Thanks for your work.

Portable.Licensing article in german dotnetpro magazine

Added by Daniel Nauck almost 5 years ago

In the next dotnetpro magazine 10/2013 (will be published on 19.09.2013) is a nice small article in german about Portable.Licensing by Fabian Deitelhoff

Don’t be that guy!

Added by Daniel Nauck almost 5 years ago

The blog post from Steffen Forkmann about the violation of the MIT/X11 license of the Portable.Licensing project by Team Knowlege Ltd. can be found here:

Portable.Licensing 1.1.0 released

Added by Daniel Nauck over 5 years ago

Portable.Licensing 1.1.0 released that fixed a security vulnerability.

Due a uninitialized seed of the random numeric generator the KeyGenerator generated equal KeyPairs each time. Please refer Bug #135 for further information.

It is highly recommend to generate a new KeyPair for your application.

The changelog is available on the roadmap site: 1.1.0


Portable.Licensing 1.0.0 released

Added by Daniel Nauck over 5 years ago

Portable.Licensing is a cross platform software licensing framework which allows you to implement licensing into your application or library. It provides you all tools to create and validate licenses for your software.

Portable.Licensing is using the latest military strength, state-of-the-art cryptographic algorithm to ensure that your software and thus your intellectual property is protected.

It is targeting the Portable Class Library and thus runs on nearly every .NET/Mono profile including Silverlight, Windows Phone, Windows Store App, Xamarin.iOS, Xamarin.Android, Xamarin.Mac and XBox 360. Use it for your Desktop- (WinForms, WPF, etc.), Console-, Service-, Web- (ASP.NET, MVC, etc.), Mobile (Xamarin.iOS, Xamarin.Android) or even LightSwitch applications.


  • runs on .NET >= 4.0.3, Silverlight >= 4, Windows Phone >= 7.5, Windows Store Apps, Mono, Xamarin.iOS, Xamarin.Android, Xamarin.Mac, XBox 360
  • easy creation and validation of your licenses
  • trial, standard and subscription licenses
  • cryptographic signed licenses, no alteration possible
  • allows you to enable/disable program modules or product features
  • limit various parameters for your software, e.g. max transactions, etc.
  • add additional key/value pair attributes to your licenses
  • easily extend the fluent validation API with extension methods

License.Manager light

A reference implementation of a management application for products, customers and licenses is available here:


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