NDC Sydney – Come learn why Figma is important to the Uno Platform

For a lot of people if you mention theĀ Uno Platform they would immediately place it in the same bucket as other cross platform, .NET, technologies such as .NET Multi-platform App UI (.NET MAUI) and Avalonia UI and if you’re only interested in the core capability of create apps that run on multiple platforms from a … Read more

Adding .NET MAUI Controls to an Existing Uno-Platform Application


In case you haven’t seen the release notes or the blog post the 4.10 release for the Uno Platform was pretty huge with a couple of big features shipping in this release. One of these features was .NET MAUI Embedding with allows any .NET MAUI Control to be embedded within an Uno Platform application. If … Read more

Windows Community Toolkit for UWP, WinUI and Uno

The Windows Community Toolkit is in pre-release of v8 – full details of their announcement here. With the new consolidated structure, there are packages for both UWP and WinUI but more importantly both sets of packages also target the Uno Platform. In this post we’re going to walk through adding one of the components from … Read more

Integrating ImageSharp with Windows and Uno Platform Applications

Earlier this week Six Labors announced the release of ImageSharp.Drawing v1.0 and it made me wonder whether this could be used as an alternative to Skia for controls that want to do custom rendering in a Windows, or multi-platform Uno Platform, application. For Skia there are already Uno (which includes Windows/WinUI) views (see source here) … Read more

Hot Reload in Windows Applications

In a previous post on the topic of hot reload I discussed using the CreateNewOnMetadataUpdate attribute to force updating of entire classes, rather than patching existing types. This makes hot reload more resilient but does require additional logic in order to apply the newly created types. In this post we’re going to walk through the … Read more

XAML Based Navigation in Windows and Multi-Platform Applications with Uno.Extensions

One of the more complex parts of building an application is getting navigation to work. In a Windows application (or in a multi-platform application using the Uno Platform) you can easily navigate between pages using Frame.Navigate and Frame.GoBack but what if you want to use a more complex navigation structure like tabs or a NavigationView. … Read more

Incremental Loading (Pagination) with MVVM and MVUX

In my first post in this sequence on MVVM and MVUX we built out a simple application that searched movies in The Mobile Database (TMDB) using the text entered to match against the movie title. What’s interesting about the TMDB api is that the search results are actually paginated with the initial request only returning … Read more

Comparing MVVM and MVUX for building a Multi-Platform Application using .NET, C# and XAML with the Uno Platform

The purpose of this post is two fold, firstly to provide an introduction to Model-View-Update-eXtended (MVUX), as developed by the Uno Platform, and secondly to provide a comparison to the more traditional Model-View-ViewModel (MVVM) approach to building XAML-based applications. In order to do this, we’ll first walk through building a simple MVVM based application where … Read more

How to Disable Individual GridView and ListView Items in a XAML Application (WinUI + Uno Platform)

One of the most significant aspects of the XAML based applications is the concept of lookless controls. I’ve covered this topic a bit in the past but in summary it means that controls can be restyled without changing the behaviour. The Windows App SDK and the Uno Platform provide out of the box styles for … Read more

Fixing Broken DefaultButtonStyle in Windows UI (WinUI) / WinAppSdk

In writing my previous post on Implicit and Explicit Styles in XAML I was reminded of a bug in the definition of the DefaultButtonStyle which prevents you setting the Foreground colour of a Button. The issue is documented, along with the fix, in this issue but for whatever reason (and I can’t think of one … Read more

Using the Windows App SDK Resource Manager (MRT Core) in Unpackaged Win32 (WinForms/WPF) App.

As a UWP developer I relied heavily on the framework to deal with managing application resources such as images and string literals. You might think this is quite simple as images are just files that are packaged with your app and strings can just be put in a constants file. Where this all gets complicated … Read more

Custom Validation Attributes and Multi-Language Resource Loading for Validation with INotifyDataErrorInfo for XAML Applications (UWP, WinUI, Uno)

I think this will be the last in the series of posts covering validation using the INotifyDataErrorInfo interface, which can be used to expose validation error messages directly in your XAML. In this post we’re going to look at adding custom validation using both the CustomValidationAttribute and by creating our own ValidationAttribute. We’ll also look … Read more

Customising Error Messages with INotifyDataErrorInfo Validation for XAML Applications (UWP, WinUI, Uno)

In my previous post, Adding Validation to a XAML Control Using INotifyDataErrorInfo, I walked through adding validation to a view model using the INotifyDataErrorInfo interface and the Community Toolkit. This post will pick up where that post left off and look at how you can customise the error message that gets displayed. This will improve … Read more

Adding Validation to a XAML Control Using INotifyDataErrorInfo and the CommunityToolkit for WinUI, WPF, UWP and Uno

In my previous post on Building a XAML UserControl I made use of the CommunityToolkit.Mvvm (formerly Microsoft.Toolkit.Mvvm) NuGet package to provide the implementation of INotifyPropertyChanged used to data bind properties of our view model to the XAML controls. In this post we’re going to again use the community toolkit but this time we’re going to … Read more

Building a XAML UserControl for WinUI, UWP, WPF or Xamarin.Forms (.NET MAUI)

One of the powerful aspects of any XAML platform is the ability to define your own controls. In this post we’re going to look at building a user control that allows you to reuse chunks of your user experience. It doesn’t matter whether you’re using UWP, WinUI, Xamarin.Forms (.NET Maui) or the Uno Platform, the … Read more

XAML Live Preview and the Future of Designers for App Development

Earlier this year I shared a post, Visual Designer, Hot Reload and Beyond, where I talked about how I thought the future of designers would evolve. Looks like I preempted a new feature that’s coming to Visual Studio 2022 called XAML Live Preview. Currently this is in preview for WPF applications but you can imagine … Read more

Visual Designer, Hot Reload and Beyond

In the last couple of years we’ve seen a massive spike in interest around “Hot Reload” thanks to the popularity of frameworks such as React/React Native and more recently, Flutter. The goal of Hot Reload is to allow developers to iteratively change their application code, whilst debugging their application – this cuts down considerably the … Read more