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.NET Community Toolkit

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add MVVM, argument-validation, and high-performance memory helpers to .NET applications as UI-framework-agnostic NuGet packages

OSS scale score 226.0OSS health 44Update pace 0 commits/30d
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Stars
3,762
Primary language
C#
License
MIT
Repository last updated
Mar 25, 2026
On this page

Overview

.NET Community Toolkit is a Microsoft-maintained, .NET Foundation collection of UI-framework-agnostic helper libraries. Packages such as CommunityToolkit.Mvvm, CommunityToolkit.Diagnostics, CommunityToolkit.HighPerformance, and CommunityToolkit.Common can be installed independently from NuGet for MVVM, validation, memory, and general utility scenarios.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Key features

Use MVVM Toolkit for observables, commands, and messaging

CommunityToolkit.Mvvm provides ObservableObject, RelayCommand and AsyncRelayCommand, messengers, validation support, and bundled source generators to reduce MVVM boilerplate.

Sources: [1][2]

Use Diagnostics Guard and ThrowHelper for validation

CommunityToolkit.Diagnostics provides Guard APIs for argument and state checks plus ThrowHelper methods for efficient exception paths.

Sources: [1][3]

Use HighPerformance helpers for Span, Memory, and pooling

CommunityToolkit.HighPerformance includes Memory2D and Span2D, pooled buffers, StringPool, SIMD-oriented HashCode helpers, and other allocation-conscious utilities.

Sources: [1][4]

Best fit

Fits shared utilities and MVVM foundations across .NET UI stacks

It suits applications and libraries spanning WPF, WinUI, .NET MAUI, Uno, and other .NET environments that want reusable ViewModel and utility patterns.

Sources: [1]

Before adoption

Install only the NuGet packages that are actually needed

The repository contains multiple independent packages rather than one mandatory umbrella dependency. Keep the API and dependency surface small by selecting only MVVM, Diagnostics, HighPerformance, or other required components.

Sources: [1]

Check target-framework and source-generator compatibility

The 8.4.2 MVVM package targets netstandard2.0, netstandard2.1, net8.0, and a Windows net8.0 TFM, and bundles source-generator builds for multiple Roslyn versions.

Sources: [2]

Separate repository build SDK requirements from package consumption

The v8.4.2 repository global.json pins .NET SDK 10.0.101, while published packages target netstandard and net8.0. Do not treat the source repository's contributor SDK as the minimum runtime requirement for consumer applications.

Sources: [5][2][6]

Official sources

  1. [1].NET Community Toolkit v8.4.2 README(2026-10-03)
  2. [2]CommunityToolkit.Mvvm 8.4.2 project metadata(2026-10-03)
  3. [3]CommunityToolkit.Diagnostics 8.4.2 project metadata(2026-10-03)
  4. [4]CommunityToolkit.HighPerformance 8.4.2 project metadata(2026-10-03)
  5. [5].NET Community Toolkit v8.4.2 global.json(2026-10-03)
  6. [6].NET Community Toolkit v8.4.2 version metadata(2026-10-03)
  7. [7].NET Community Toolkit v8.4.2 release(2026-10-03)
  8. [8].NET Community Toolkit MIT license(2026-10-03)
Supplemental curator note

The toolkit is useful when WPF, WinUI, .NET MAUI, and other applications should share helpers without tying them to one UI stack. It ships as feature-specific NuGet packages, so select only MVVM, Diagnostics, HighPerformance, or other components that are actually needed.

Try it in 3 steps

  1. 1

    Create a small .NET console project

    Validate a package API in a small project before adding it to an existing application.

    dotnet new console -n ToolkitDemo && cd ToolkitDemo
  2. 2

    Add Diagnostics 8.4.2

    Pin only the package needed for argument validation rather than taking unrelated toolkit components.

    dotnet add package CommunityToolkit.Diagnostics --version 8.4.2
  3. 3

    Run the Guard API

    Execute a null guard and confirm the package is referenced and running correctly.

    printf 'using CommunityToolkit.Diagnostics;\nstring? value = "ok";\nGuard.IsNotNull(value);\nConsole.WriteLine(value);\n' > Program.cs && dotnet run
Check the official README

Growth

Growth trends · Last 30 days

3,762 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
0
Open PRs
25

Development activity is still being collected.

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GitHub data

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GitHub Topics

  • dotnet
  • csharp
  • mvvm
  • netstandard
  • netframework
  • netcore
  • maui
  • wpf
  • uwp
  • uno-platform
Stars
3,762
Forks
401
Watchers
69
Open issues
193
Contributors
62
Owner type
Organization
Primary language
C#
License
MIT
Repository last updated
Mar 25, 2026
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