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Eclipse aCute: C# in Eclipse IDE

Support for C# development in the Eclipse IDE. Supports rich edition, execution of .NET programs, debugging of .NET program, integration with dotnet CLI (for export, publish...).

aCute is an project. See .

Video Demo of Editor and .NET Core Commands Integration



  • On any OS, dotnet(v2.0 or later) needs to be available in your PATH.
  • On Windows, .NET SDK needs to be installed.
  • On Mac: Unknown. If you discover an issue or required prerequisite, please report the issue.

Or see Alternative configuration

Installation in Eclipse IDE

Using Eclipse Marketplace:

Using p2 repository, with the Install New Software wizard (or to reference in p2 director command, or in target-platform description for your RCP application)

  • use for the latest release, or
  • use to try the latest build from master.


Eclipse aCute relies on OmniSharp-Roslyn and Language Server Protocol for edition, and on netcoredbg and Debug Adapter Protocol for debugging. Integration with those tools is powered by Eclipse LSP4E

Eclipse aCute relies on TM4E and a textmate grammar to provide syntax highlighting in the IDE.

Alternative configuration

You can setup a local OmniSharp Language Server fetched, configured and working locally. Then at least one of the following environment variables should be set to make Eclipse IDE able to locate your specific OmniSharp-node-client:

  • OMNISHARP_LANGUAGE_SERVER_COMMAND: a command-line to start the language server over stdio (such as /usr/bin/node /home/mistria/git/omnisharp-node-client/languageserver/server.js or /home/mistria/omnisharp-roslyn/run -lsp -stdio)

Note that this approach isn't recommended nor supported by the aCute project developers. It's mainly useful for contributors who want to hack things around Omnisharp-node-client and/or aCute.