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Top 23 C# Visual Studio Projects
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Roslyn
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
Project mention: .NET 10 Preview 6 brings JIT improvements, one-shot tool execution | news.ycombinator.com | 2025-07-30Yes it is. you can fork the roslyn compiler and toolchain here: https://github.com/dotnet/roslyn It's even an mit license one of the most permissive.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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EquinoxProject
Web Application ASP.NET 9 using Clean Architecture, DDD, CQRS, Event Sourcing and a lot of good practices
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Prism
Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Xamarin Forms, and Uno / Win UI Applications.. (by PrismLibrary)
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UWP Community Toolkit
The Windows Community Toolkit is a collection of helpers, extensions, and custom controls. It simplifies and demonstrates common developer tasks building .NET apps with UWP and the Windows App SDK / WinUI 3 for Windows 10 and Windows 11. The toolkit is part of the .NET Foundation.
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The project code state at the time of the analysis matches this commit.
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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ComputeSharp
A .NET library to run C# code in parallel on the GPU through DX12, D2D1, and dynamically generated HLSL compute and pixel shaders, with the goal of making GPU computing easy to use for all .NET developers! 🚀
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sdk
Core functionality needed to create .NET Core projects, that is shared between Visual Studio and CLI (by dotnet)
Project mention: .NET 10 Preview 6 brings JIT improvements, one-shot tool execution | news.ycombinator.com | 2025-07-30https://github.com/dotnet/sdk/issues/48174
- Project mention: Malleable software: Restoring user agency in a world of locked-down apps | news.ycombinator.com | 2025-06-10
https://serenity.is/
I am 50 years old with a few decades of experience.
For past four years I have been voluntarily paying for Serenity's commercial offering (called StartSharp) in order to support them, as well as to express my gratitude for saving my sanity.
I mean, technically I could do with their free and open source version, as it packs plenty enough of punch.
C# / typescript / asp.net core / Visual Studio / linux deployment friendly, also under docker / works well enough with Postgres
Long time HN lurker, registered today solely to convey this message.
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EFCorePowerTools
Entity Framework Core Power Tools - reverse engineering, migrations and model visualization in Visual Studio & CLI
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CodeMaid
CodeMaid is an open source Visual Studio extension to cleanup and simplify our C#, C++, F#, VB, PHP, PowerShell, JSON, XAML, XML, ASP, HTML, CSS, LESS, SCSS, JavaScript and TypeScript coding.
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Asp.Net-Core-Inventory-Order-Management-System
Now upgraded to .NET 9, this project is a super-fast, completely headless API powered by Clean Architecture, CQRS, and MediatR. It includes an ASP.NET Core Razor Pages implementation for inventory order management, combined with Vue.js for a dynamic, responsive UI. Powerful WMS solution. Demo (username:admin@root.com / pwd:123456)
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Sharpmake
Sharpmake is an open-source C#-based solution for generating project definition files, such as Visual Studio projects and solutions, GNU makefiles, Xcode projects, etc.
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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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vstest
Visual Studio Test Platform is the runner and engine that powers test explorer and vstest.console.
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SqlCeToolbox
SQLite & SQL Server Compact Toolbox extension for Visual Studio, SSMS (and stand alone)
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SaaSHub
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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# Visual Studio discussion
C# Visual Studio related posts
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Microsoft makes mistakes too. Let's check MSBuild
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How to update library and get swamped with this task.
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How to Speak Directly in Robinhood?
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Can you talk to people on Robinhood?
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Am writing a software used to manage elections in Kenya
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Go 1.23 Released
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The main features I want for C#
- A note from our sponsor - SaaSHub www.saashub.com | 23 Dec 2025
Index
What are some of the best open-source Visual Studio projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Roslyn | 20,086 |
| 2 | EquinoxProject | 6,759 |
| 3 | Prism | 6,698 |
| 4 | UWP Community Toolkit | 6,041 |
| 5 | MSBuild | 5,471 |
| 6 | VsVIM | 3,747 |
| 7 | Roslynator | 3,347 |
| 8 | OneMore | 3,129 |
| 9 | ComputeSharp | 3,069 |
| 10 | sdk | 3,028 |
| 11 | Serene | 2,667 |
| 12 | PTVS | 2,564 |
| 13 | EFCorePowerTools | 2,454 |
| 14 | CodeMaid | 1,967 |
| 15 | DockPanelSuite | 1,833 |
| 16 | Asp.Net-Core-Inventory-Order-Management-System | 1,198 |
| 17 | Sharpmake | 1,074 |
| 18 | project-system | 1,006 |
| 19 | MSTest | 968 |
| 20 | vstest | 939 |
| 21 | CodeConverter | 889 |
| 22 | SqlCeToolbox | 887 |
| 23 | DarkUI | 862 |
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