C# GUI with Qt

The Qt Bridge for C# lets you write your UI once in QML and run it on Windows, macOS, and Linux, while your application logic stays in C#. Embedded Linux also works when it behaves like regular Linux. iOS, Android, and web targets aren’t yet supported in the Technology Preview.

Yes. With the Qt Bridge for C#, you describe your UI in QML instead of XML. QML is a declarative language built for user interfaces: you describe what the UI should look like, and Qt Quick keeps it in sync with your C# backend logic. That makes UI code shorter, more readable, easy to learn, and quick to prototype.

Both are declarative languages to describe a UI, but XAML is XML-based markup, while QML is a language purpose-built for UIs, with property bindings and JavaScript expressions built in. QML can be both interpreted for fast iteration and compiled for predictable performance. With the Qt Bridge for C#, the QML UI layer adds cleanly in front of your C# backend.

Yes. Especially if your backend already separates logic from the UI, the backend can stay untouched while you build a new GUI in front of it. With the Qt Bridge for C#, you keep your existing C# libraries, NuGet dependencies, and practices, and expose your C# objects and data models directly to a QML frontend.

Yes. The Qt Bridge for C# exposes your view models to QML without extra attributes: public members are available by default, properties that implement INotifyPropertyChanged become bindable, and C# events become QML signal handlers. You can fine-tune what’s exposed with attributes, and your familiar C# workflow and tooling stay the same.

No. The Qt Bridge for C# lets you build both the UI and the backend logic without writing C++ or learning Qt’s own container types. You do need to learn QML, a declarative UI language that’s easy to learn and read, as well as some Qt concepts. For the rest, you stay in your usual C# workflow.

The Qt Bridge for C# gives you Qt Quick’s graphs for data visualization, plus advanced 2D and 3D graphics, from a C# backend. Your data processing stays in C#, QML binds to it directly, and rendering is GPU-accelerated through Qt Quick’s efficient scene graph, reducing also runtime memory use for visually heavy interfaces.

Your application code is. With the Qt Bridge for C#, you write the backend in C# and the UI in QML, both memory-safe languages. Like every C# UI framework, Qt renders through native code, in Qt’s case C++. That core is maintained under a public security policy, and, on top, the Qt Bridge reduces the amount of application code exposed to manual-memory risks.