C# Markup 2

Concise next-gen C# Markup for .NET UI frameworks

C# Markup 2 for Uno Platform

C# Markup 2 supports multiple UI frameworks, including the excellent Uno Platform.

If you don't know Uno, I recommend you check them out; Uno is one of the best and most mature .NET UI frameworks, it offers an impressive breadth of features that will have your back when you need to create real-world production apps end2end, fast.

Quick play-around

dotnet new install Uno.Templates
dotnet new install Modern.CSharp.Templates

md UnoCSharpMarkup2
cd UnoCSharpMarkup2

dotnet new unoapp -preset recommended
dotnet new mcs-uno-markup2 --presentation mvux --renderer skia --allow-scripts yes

Markup options at a glance - good for everyone!

Uno Platform supports both XAML and C# UI with Uno C# Markup. C# Markup 2 adds another option that goes above and beyond what gen-1 C# Markup variants offer.

It's good to have options - everyone wins: devs get the experience that they like best, and the UI framework gains more adoption. Check it out and pick what you like!

As a first impression, here's a quick side-by-side comparison:

Enjoy a Flutter-like UI development experience with C# Markup 2:

• Build .NET applications fully in C#
• Unclutter your markup - while reading and writing.<br />
  • C# Markup 2 goes above and beyond gen 1 C# Markup approaches (e.g. Maui or Uno) to eliminate a lot of verbosity: no more endless repetitions of new , HorizontalAlignment = HorizontalAlignment.Center, () => or nameof(), no more specifying for each and every TextBlock binding that yes, you want to bind to the Text property...
  • Separated markup namespaces eliminate intellisense pollution, allow quick discovery and encourage clean separation of markup and logic: no more intellisense lists where you have to search in a sea of irrelevant options for the few that you are interested in. See only Markup API's while editing MyPage.cs, see UI framework and other API's while editing MyPage.logic.cs.
• Target browsers and native desktop / mobile
• Use existing UI frameworks. Mature or bleeding edge is your choice: WPF, WinUI 3 for Windows App SDK and Uno Platform. Coming: AvaloniaUI, Maui, possibly Blazor.
• Use the built-in MVVM support - or any other update model that supports your UI framework (e.g. Uno's MVUX or ReactiveUI)
• Use for part or all of your application UI
• Designed to handle large UI fast: practically allocation-free, no reflection, efficient C#

No XAML / HTML / JavaScript / CSS required. No engine or layers to get in your way.

NuGet<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />

Chat (if needed, join DotNetEvolution first)<br /> <br /> The best place to ask questions or help!

Getting Started

• Uno Platform / WinUI 3: Getting started with C# Markup 2 for WinUI 3 and Windows App SDK / Uno Platform
• WPF: Getting started with C# Markup 2 for WPF

Looking for C# Markup 1? Find it here

News

July 14, 2025

Mapsui 5 support added!

Mapsui 5 - currently in beta, and one of the best OSS .NET libraries for maps - now has full support in C# Markup 3.1 for Uno Platform 6.0!

An example page using Mapsui is added to the example app in this repo, demonstrating how to use Mapsui with C# Markup 2. Browse Live Mapsui 5.0 samples to experience the possibilities; see the samples source for how.

July 4, 2025

ScottPlot 5 support added!

ScottPlot.NET - one of the best OSS .NET libraries for graphs and charts - now has full support in C# Markup 3.1 for Uno Platform 6.0!

An example page using ScottPlot is added to the example app in this repo, demonstrating how to use ScottPlot with C# Markup 2. Use the excellent ScottPlot 5.0 Cookbook to create beautiful graphs!

May 12, 2025

New C# Markup 3.1 for Uno Platform 6.0

Hot on the heels of the game-changing Uno 6.0 release, today's release adds full support for Uno SDK 6.0 / Windows App SDK 1.7 to all CSharpMarkup.WinUI NuGets.

Includes support for all API improvements in Uno SDK 6.0:

• 20+ WinUI API's are no longer marked unsupported
• Add support for ellipse shape to ProgressBarTemplateSettings
• New TitleBar support, including strongly-typed access to all new Titlebar resources in ThemeResource
• New TextBoxExtensions allow to specify InputReturnType

The example app in the repo is also updated to Uno 6.0 / Windows App SDK 1.7.

May 5, 2025

New C# Markup 3.0 for Uno Platform 5.6 and .NET 9

Today's release adds full support for Uno SDK 5.6 / Windows App SDK 1.6 and .NET 9 / .NET 8 to all CSharpMarkup.WinUI NuGets.

Includes support for all improvements in Uno SDK 5.6:

• 80+ WinUI API's are no longer marked unsupported
• new ScrollPresenterAutomationPeer, FauxGradientBorderPresenter
• new NewFrameworkTemplateBuilder support

The example app in the repo is also updated to .NET 9 plus Uno 5.6 / Windows App SDK 1.6 and demonstrates how to use C# partial properties with MVVM Community Toolkit to support AOT.

May 7, 2024

New C# Markup 2.4 for Uno Platform 5.2 incl .NET Single Project

Today's release is fully updated to Updated to Uno 5.2 including Uno's .NET Single Project and uno.sdk!

Plus:

• Added support for latest dotnet new unoapp template
• Updated to Uno.Extensions.* 4.1
• Updated to Microsoft.WindowsAppSDK 1.5

Dec 21, 2023

New C# Markup 2 templates for Uno Platform 5

In addition to some new C# Markup 2 methods, today's release adds support for the new C# Markup 2 templates for Uno Platform 5: an updated mcs-uno-markup2 template, and a new mcs-uno-view template.

• Enjoy improved frictionless startup for both existing and new Uno solutions - whether created with Uno's dotnet new unoapp template or with the Uno solution wizard for Visual Studio
• Full support for .NET 8 / .NET 7, as well as model types MVUX / MVVM / none
• The new mcs-uno-view template is used by the convenient New-View.ps1 script, which is included in mcs-uno-markup2
• Templates are now pre-structured in accordance with best practices for maintainability and code reuse of C# Markup 2 UI.

Nov 18, 2023

2.3 Release is GA - adds support for .NET 8, Uno 5 plus 5 Uno Libraries!

This release i