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Top 23 C# Microsoft Projects
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Introducing .NET Multi-platform App UI (MAUI)
.NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.
Project mention: Ask HN: What Is the State of App Development in 2026? | news.ycombinator.com | 2026-05-30 -
ReSharper
ReSharper is now available in VS Code and Cursor. ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.
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awesome-dotnet-core
:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software
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DotNetGuide
🌈【C#/.NET/.NET Core学习、工作、面试指南】记录、收集和总结C#/.NET/.NET Core基础知识、学习路线、开发实战、编程技巧练习、学习视频、文章、书籍、项目框架、社区组织、开发必备工具、技术前沿周刊、常见面试题、面试须知、简历模板、人才招聘、以及自己在学习和工作中的一些微薄见解。希望能和大家一起学习，共同进步。如果本知识库能为您提供帮助，别忘了给予支持哦(关注、点赞、分享)💖。
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azure-sdk-for-net
This repository is for active development of the Azure SDK for .NET. For consumers of the SDK we recommend visiting our public developer docs at https://learn.microsoft.com/dotnet/azure/ or our versioned developer docs at https://azure.github.io/azure-sdk-for-net.
Project mention: Pressure-testing Ota on Azure SDK for .NET: typed NuGet hydration across ephemeral containers | dev.to | 2026-08-10Upstream repository: Azure/azure-sdk-for-net
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Project mention: 9 Things That Silently Kill Your .NET Build Time (and How to Fix Each One) | dev.to | 2026-04-06
MSBuild's ResolveAssemblyReference (RAR) task maps every assembly reference in your project to an actual .dll path on disk. The critical detail: RAR runs unconditionally on every build, including incremental builds. As dotnet/msbuild Issue #2015 explains, the build system cannot know whether you've installed a new targeting pack since the last build, so it re-resolves every time.
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If you would like to know more about installing the Azure PowerShell module, here are some links for guidance: • https://github.com/Azure/azure-powershell • https://learn.microsoft.com/en-us/powershell/azure/install-azps-windows?view=azps-15.4.0&tabs=windowspowershell&pivots=windows-psgallery • https://learn.microsoft.com/en-us/powershell/azure/troubleshooting?view=azps-15.4.0#az-and-azurerm-coexistence.
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Code Effects
Code Effects: AI-Ready .NET Business Rules Engine. Embed visual business rules in your .NET app with AI-assisted authoring, native VS debugging, blazing-fast compiled evaluation, and no SaaS dependency. FREE edition available.
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CDM
The Common Data Model (CDM) is a standard and extensible collection of schemas (entities, attributes, relationships) that represents business concepts and activities with well-defined semantics, to facilitate data interoperability. Examples of entities include: Account, Contact, Lead, Opportunity, Product, etc.
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data-api-builder
Data API builder provides modern REST, GraphQL endpoints and MCP tools to your Azure Databases and on-prem stores.
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WgServerforWindows
Wg Server for Windows (WS4W) is a desktop application that allows running and managing a WireGuard server endpoint on Windows
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Blogifier
Blogifier is an open-source publishing platform Written in ASP.NET and Blazor WebAssembly. With Blogifier make a personal blog or a website.
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PowerPlatformConnectors
This is a repository for Microsoft Power Automate, Power Apps, and Azure Logic Apps connectors
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MSTest
This repository holds the source code of Microsoft.Testing.Platform (MTP), a lightweight alternative to VSTest, as well as MSTest adapter and framework. (by microsoft)
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PiP-Tool
PiP tool is a software to use the Picture in Picture mode on Windows. This feature allows you to watch content (video for example) in thumbnail format on the screen while continuing to use any other software on Windows.
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prose
Microsoft Program Synthesis using Examples SDK is a framework of technologies for the automatic generation of programs from input-output examples. This repo includes samples and sample data for the Microsoft Program Synthesis using Example SDK. (by microsoft)
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Kargo
Stop Scripting Promotions. Start Shipping with Kargo. Kargo automates promotion across dev, staging, and prod with approval gates and verification. Open source, built by the team behind Argo CD. Download now.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C# Microsoft discussion
C# Microsoft related posts
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Pressure-testing Ota on Azure SDK for .NET: typed NuGet hydration across ephemeral containers
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Troubleshooting DefaultAzureCredential: Identifying Which Credential Is Used
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OCR With Logic App Connector.
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Declarative database development and database portability tool
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Microsoft makes mistakes too. Let's check MSBuild
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Data API builder: modern REST, GraphQL endpoints to Databases and on-prem stores
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Introducing Awesome .NET Testing ✅
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A note from our sponsor - AppSignal
www.appsignal.com | 6 Sep 2026
Index
What are some of the best open-source Microsoft projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Introducing .NET Multi-platform App UI (MAUI) | 23,315 |
| 2 | awesome-dotnet-core | 21,373 |
| 3 | DotNetGuide | 10,874 |
| 4 | azure-sdk-for-net | 6,046 |
| 5 | MSBuild | 5,547 |
| 6 | Azure PowerShell | 4,778 |
| 7 | FlaUI | 3,114 |
| 8 | ContextMenuForWindows11 | 2,873 |
| 9 | PeachPie | 2,488 |
| 10 | spark | 2,097 |
| 11 | CDM | 1,822 |
| 12 | microsoft-authentication-library-for-dotnet | 1,502 |
| 13 | data-api-builder | 1,507 |
| 14 | WgServerforWindows | 1,374 |
| 15 | Blogifier | 1,295 |
| 16 | PowerPlatformConnectors | 1,277 |
| 17 | MSTest | 1,041 |
| 18 | PiP-Tool | 1,038 |
| 19 | bcrypt.net | 999 |
| 20 | SolrNet | 954 |
| 21 | powershell | 900 |
| 22 | msgraph-sdk-powershell | 895 |
| 23 | prose | 661 |
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