C# Hyperlink in TextBlock: nothing happens when I click on it

You need to handle the hyperlink's RequestNavigate event. Here's a quick way of doing it:

link.RequestNavigate += (sender, e) =>{    System.Diagnostics.Process.Start(e.Uri.ToString());};

Are you handling the 'Hyperlink.RequestNavigate' event? When a user clicks a Hyperlink in a WPF window it doesn't automatically open a browser with the URI specified in its NavigateUri property.

In your code-behind you can do something like:

link.RequestNavigate += LinkOnRequestNavigate;private void LinkOnRequestNavigate(object sender, RequestNavigateEventArgs e){    System.Diagnostics.Process.Start(e.Uri.ToString());}

You can make a global hyperlink handler in your App.xaml.cs

protected override void OnStartup(StartupEventArgs e) {    EventManager.RegisterClassHandler(        typeof(System.Windows.Documents.Hyperlink),        System.Windows.Documents.Hyperlink.RequestNavigateEvent,        new System.Windows.Navigation.RequestNavigateEventHandler(            (sender, en) => System.Diagnostics.Process.Start(en.Uri.ToString())        )    );    base.OnStartup(e);}

This assumes all the NavigateUri properties refer to something you want to launch, but you can always make the handler take care of edge cases.