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Drag Visual Studio Code.app to the Applications folder, making it available in the macOS Launchpad. Add VS Code to your Dock by right-clicking on the icon to bring up the context menu and choosing Options, Keep in Dock. Launching from the command line # You can also run VS Code from the terminal by typing 'code' after adding it to the path. Visual Studio extension development. Create add-ons and extensions for Visual Studio, including new commands, code analyzers, and tool windows. Add the SDKs and tools you need to create new commands, code analyzers, tool windows, and language services using C#. Then, share your extension with the community in the Visual Studio. Free offers: Visual Studio Community, Visual Studio Code, VSTS, and Dev Essentials.

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C# for Visual Studio Code (powered by OmniSharp)

Welcome to the C# extension for Visual Studio Code! This extension provides the following features inside VS Code:

Download Visual Studio Community, Professional, and Enterprise. Try Visual Studio IDE, Code or Mac for free today. Visual Studio Code is free and available on your favorite platform - Linux, macOS, and Windows. Download Visual Studio Code to experience a redefined code editor, optimized for building and debugging modern web and cloud applications.

  • Lightweight development tools for .NET Core.
  • Great C# editing support, including Syntax Highlighting, IntelliSense, Go to Definition, Find All References, etc.
  • Debugging support for .NET Core (CoreCLR). NOTE: Mono debugging is not supported. Desktop CLR debugging has limited support.
  • Support for project.json and csproj projects on Windows, macOS and Linux.

The C# extension is powered by OmniSharp.

Get Started Writing C# in VS Code

Note about using .NET Core 3.1.40x SDKs

The .NET 3.1.40x SDKs require version 16.7 of MSBuild.

For MacOS and Linux users who have Mono installed, this means you will need to set omnisharp.useGlobalMono to never until a version of Mono ships with MSBuild 16.7.

Note about using .NET 5 SDKs

The .NET 5 SDK requires version 16.8 of MSBuild.

For Windows users who have Visual Studio installed, this means you will need to be on the latest Visual Studio 16.8 Preview.For MacOS and Linux users who have Mono installed, this means you will need to set omnisharp.useGlobalMono to never until a version of Mono ships with MSBuild 16.8.

What's new in 1.23.11

  • Move the global Mono check to the correct place (#4489, PR: #4492)

What's new in 1.23.10

  • Support solution filters (*.slnf) (PR: #4481)
  • Prompt user to install Blazor WASM companion extension if needed (PR: #4392)
  • Add path to dotnet so child processes can use the CLI (PR: #4459)
  • Give more information when Mono is missing or invalid. (#4428, PR: #4431)
  • Revert incremental change forwarding (PR: #4477)
  • Fixes to asset generation (PR: #4402)
  • Add properties to blazorwasm debug configuration. (dotnet/aspnetcore#30977, PR: i#4445)
  • Avoid white status bar items to ensure contrast (#4384, PR: #4385)
  • Update OmniSharp to 1.37.8
    • Update Roslyn version to 3.10.0-1.21125.6 (PR: omnisharp-roslyn#2105)
    • Update included build tools to closely match NET 6 Preview 1 SDK (PR: omnisharp-roslyn#2103)
    • Improve custom error messages for MSB3644 (PR: omnisharp-roslyn#2097)
    • Do not call FindReferencesAsync for null symbol (omnisharp-roslyn#2054, PR: omnisharp-roslyn#2089)
    • use an OmniSharp specific message for MSB3644 (omnisharp-roslyn#2029, PR: omnisharp-roslyn#2069)
    • changed the default RunFixAllRequest timeout to 10 seconds (PR: omnisharp-roslyn#2066)
    • Support Solution filter (.slnf) (PR: omnisharp-roslyn#2121)
    • updated to IL Spy 7.0.0.6372 (PR: omnisharp-roslyn#2113)
    • Add sentinel file to MSBuild to enable workload resolver (#4417, PR: omnisharp-roslyn#2111)
    • fixed CS8605 'Unboxing possibly null value' (PR: omnisharp-roslyn#2108)
  • Updated Razor support (PR: #4470)
    • Bug fixes

What's new in 1.23.9

  • Add option to organize imports during document formatting. (PR: #4302)
  • Update to use zero based indexes (PR: #4300)
  • Improve request queues to improve code completion performance (PR: #4310)
  • Add setting to control whether to show the OmniSharp log on error (#4102, #4330, PR: #4333)
  • Support building launch assets for NET6-NET9 projects (#4346, PR: #4349)
  • Add debugger support for Concord extensions. See the ConcordExtensibilitySamples wiki for more information.
  • Update OmniSharp version to 1.37.6
    • Handle records in syntax highlighting (#2048, PR: #2049)
    • Remove formatting on new line (PR: #2053)
    • Validate highlighting ranges in semantic highlighting requests (PR: #2055)
    • Delay project system init to avoid solution update race (PR: #2057)
    • Use 'variable' kind for parameter completion (#2060, PR: #2061)
    • Log request when response fails (#2064)

What's new in 1.23.8

  • Updated Debugger support (PR: #4281)
    • Updated the version of .NET that the debugger uses for running its own C# code to .NET 5
    • Updated .NET debugging services loader to address problem with debugging after installing XCode12 (dotnet/runtime/#42311)
    • Fixed integrated terminal on non-Windows (#4203)
  • Updated Razor support (PR: #4278)
    • Bug fixes
  • Update OmniSharp version to 1.37.5 (PR: #4299)
    • Update Roslyn version to 3.9.0-2.20570.24 (PR: omnisharp-roslyn#2022)
    • Editorconfig improvements - do not lose state, trigger re-analysis on change (omnisharp-roslyn#1955, #4165, #4184, PR: omnisharp-roslyn#2028)
    • Add documentation comment creation to the FormatAfterKeystrokeService (PR: omnisharp-roslyn#2023)
    • Raise default GotoDefinitionRequest timeout from 2s to 10s (#4260, PR: omnisharp-roslyn#2032)
    • Workspace create file workaround (PR: omnisharp-roslyn#2019)
    • Added msbuild:UseBundledOnly option to force the usage of bundled MSBuild (PR: omnisharp-roslyn#2038)
  • Support auto doc comment generation (#8, PR: #4261)
  • Add schema support for appsettings.json (#4279, PR: #4280)
  • Add schema support for global.json (PR: #4290)
  • Update remoteProcessPickerScript windows ssh exit (#3482, PR: #4225)
  • Do not start OmniSharp server in Live Share scenarios (#3910, PR: #4038)
  • Suppress codelens for IEnumerable.GetEnumerator (#4245, PR: #4246)
  • Allow arm64 MacOS to debug dotnet projects (#4277, PR: #4288)

Emmet support in Razor files

To enable emmet support, add the following to your settings.json:

Semantic Highlighting

The C# semantic highlighting support is in preview. To enable, set editor.semanticHighlighting.enabled and csharp.semanticHighlighting.enabled to true in your settings. Semantic highlighting is only provided for code files that are part of the active project.

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To really see the difference, try the new Visual Studio 2019 Light and Dark themes with semantic colors that closely match Visual Studio 2019.

Supported Operating Systems for Debugging

  • Currently, the C# debugger officially supports the following operating systems:

    • X64 operating systems:
      • Windows 7 SP1 and newer
      • macOS 10.12 (Sierra) and newer
      • Linux: see .NET Core documentation for the list of supported distributions. Note that other Linux distributions will likely work as well as long as they include glibc and OpenSSL.
    • ARM operating systems:
      • Linux is supported as a remote debugging target

Found a Bug?

To file a new issue to include all the related config information directly from vscode by entering the command pallette with Ctrl+Shift+P(Cmd+Shift+P on macOS) and running CSharp: Report an issue command. This will open a browser window with all the necessary information related to the installed extensions, dotnet version, mono version, etc. Enter all the remaining information and hit submit. More information can be found on the wiki.

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Alternatively you could visit https://github.com/OmniSharp/omnisharp-vscode/issues and file a new one.

Development

First install:

  • Node.js (8.11.1 or later)
  • Npm (5.6.0 or later)

To run and develop do the following:

  • Run npm i
  • Run npm run compile
  • Open in Visual Studio Code (code .)
  • Optional: run npm run watch, make code changes
  • Press F5 to debug

To test do the following: npm run test or F5 in VS Code with the 'Launch Tests' debug configuration.

License

Copyright © .NET Foundation, and contributors.

The Microsoft C# extension is subject to these license terms.The source code to this extension is available on https://github.com/OmniSharp/omnisharp-vscode and licensed under the MIT license.

Code of Conduct

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This project has adopted the code of conduct defined by the Contributor Covenantto clarify expected behavior in our community.For more information see the .NET Foundation Code of Conduct.

Contribution License Agreement

By signing the CLA, the community is free to use your contribution to .NET Foundation projects.

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.NET Foundation

This project is supported by the .NET Foundation.

What is Live Share?

Live Share enables you to quickly collaborate with a friend, classmate, or professor on the same code without the need to sync code or to configure the same development tools, settings, or environment.

When it comes to Live Share, seeing is believing. Check out this video to see Live Share in action:

When you share a collaborative session, the person you're working with sees the context of the workspace in their editor. This means your classmate can read the code you shared without having to clone a repo or install any dependencies your code relies on. They can help you with your code in the Visual Studio Code environment that's familiar to them.

Each of you can open files, navigate, edit code, or highlight - and changes are instantly reflected. As you edit you can see your classmate's cursor, jump to the same location, and follow their actions.

You can also debug together using VS Code's debugging features, like hovers, locals and watches, the stack trace or the debug console. You are both able to set breakpoints and advance the debug cursor to step through the session.

For more details about what you can do with Live Share, visit the how-to-guide or read the quick-start below.

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Get started with Live Share

To get started with using Live Share in VS Code, you'll need to download the Live Share Extension Pack from the Extension Marketplace.

This extension pack includes everything you need to start collaboratively editing and debugging in real time, including integrated audio and text chat. This provides you and your team/class with a one-click installation, in order to begin pair programming, performing remote code reviews, driving interactive lectures, and more, without needing to leave Visual Studio Code.

Once you log into your GitHub account, you'll see the Live Share icon in the Activity Bar.

Starting a Live Share session

If you select Start Collaboration session from the Session Details menu, an invitation link to your session will automatically be copied to your clipboard. You can share this link with anyone you'd like to collaborate with, as long as they also have VS Code and the Live Share Extension Pack downloaded.

When your classmate joins the session, you'll get a notification, and see their name come up under Participants.

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Joining a Live Share session

If you select Join Collaboration session from the Session Details menu, you're able to enter the URL you received.

You should be able to see and interact with your classmate's code on your screen!