.cs file: how to open it on Windows

36 Windows apps register the .cs extension. Install one of them to open the file with a double-click.

About the format

Format: C# source code
MIME type: text/x-csharp

Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).

micro
A modern and intuitive terminal-based text editor.

Open source 2.0.15 107.1K ↓ ★ 29.7K
Notepad3
Notepad like text editor based on the Scintilla source code.

Free 7.26.602.1 84.4K ↓ ★ 6.7K
Uncrustify Code Beautifier
A source code beautifier for C, C++, C#, Objective-C, D, Java, Pawn, and Vala.

Open source 0.79.0 27.6K ↓ ★ 3.1K
Kiro
An agentic IDE that helps you do your best work with features such as specs, steering, and hooks.

Proprietary 1.4.26 13K ↓
Windsurf
The most powerful AI IDE

Proprietary 2.3.15 12.3K ↓
Void
The open source AI code editor.

Open source 1.99.30044 ★ 28.7K
Antigravity IDE
Experience liftoffwith the next-generation IDE

Proprietary 2.5.5 1.2K ↓
Positron
A next-generation data science IDE

Proprietary 2026.10.1 ★ 4.3K
Aide
The open-source AI-native IDE

Open source 1.96.4.25031 ★ 2.2K
Ox editor
The simple but flexible text editor

Open source 0.7.7 ★ 3.7K
TheiaIDE
A modern and open IDE for cloud and desktop.

Open source 1.76.0 ★ 612
SAKURA Editor
SAKURA Editor (Japanese text editor for MS Windows)

Open source 2.4.3 ★ 1.5K
Cursor
The AI Code Editor

Proprietary 3.20.14
Comate
Intelligent coding capabilities throughout the entire development process along with enhanced multimodal abilities. Install now to start a seamless and natural intelligent development experience.

Proprietary 3.11.5
JetBrains Rider (EAP)
Fast & powerful cross-platform .NET IDE

Free 263.7031.38
Trae CN
An adaptive AI IDE that transforms how you work, collaborating with you to run faster.

Proprietary 3.4.4
Trae
An adaptive AI IDE that transforms how you work, collaborating with you to run faster.

Proprietary 3.6.4
JetBrains Rider
Fast & powerful cross-platform .NET IDE

Proprietary 2026.2.3.1
Tabular Editor 3
A tool that lets you easily manipulate and manage measures, calculated columns, display folders, perspectives and translations in Analysis Services Tabular and Power BI Sematic Models.

Proprietary 3.27.1.1
Devin
Manage fleets of local and cloud agents from one surface. Plan, delegate, review, and ship without leaving your editor.

Proprietary 3.10.48
Cortex Code
Accelerate your data lifecycle with Cortex Code, a Snowflake-native AI coding agent. Simplify data engineering, ML, and agent-building with natural language.

Proprietary 1.21.8
Sublime Text 4
Sublime is a sophisticated cross-platform text editor for code, markup and prose.

Proprietary 4.0.0.421500
BlastMerge
Cross-repository file synchronization through intelligent iterative merging

Open source 1.0.21 ★ 1
CatPawAI
AI Programming Agent

Proprietary 2026.9.2
CoScreen
Pair program and debug together through collaborative screen sharing that's made for engineering teams.

Proprietary 8.11.14
EditPlus
Text editor with FTP, FTPS and SFTP capabilities

Proprietary 6.1.780.0
Lingma
Fully integrated with the AI coding assistant, enjoy efficient and intelligent programming with an out-of-the-box experience without installing any plugins.

Proprietary 1.106.3
Sublime Text 4 (Dev)
Sublime is a sophisticated cross-platform text editor for code, markup and prose.

Proprietary 4.0.0.421400
CodeBuddy
Tencent Cloud Code Assistant

Proprietary 1.106.1
Qoder
Agentic Coding Platform for Real Software

Proprietary 1.106.3
Qoder IDE
Agentic Coding Platform for Real Software

Proprietary 1.106.3
EverEdit
Professional Text & Source Editor

Proprietary 4.5.0.4500
Haystack Editor
Navigate and refactor your code with ease

Proprietary 1.90.0
Text Editor Pro
Powerful text editing tool

Free 37.4.0
PearAI
The AI Code Editor for Your Next Project.

Proprietary 1.8.9
CodeBuddy CN
Tencent Cloud Code Assistant CodeBuddy, an AI-powered coding IDE.

Proprietary 1.106.1