GNU ELPA - csharp-mode

• font-lock and indent of C# syntax including:
  • all c# keywords and major syntax
  • attributes that decorate methods, classes, fields, properties
  • enum types
  • #if/#endif #region/#endregion
  • instance initializers
  • anonymous functions and methods
  • verbatim literal strings (those that begin with @)
  • generics
• intelligent insertion of matched pairs of curly braces.
• compilation-mode support for msbuild, devenv and xbuild.

You can enable experimental tree sitter support for indentation and highlighting using

(use-package tree-sitter :ensure t)
(use-package tree-sitter-langs :ensure t)
(use-package tree-sitter-indent :ensure t)

(use-package csharp-mode
  :ensure t
  :config
  (add-to-list 'auto-mode-alist '("\\.cs\\'" . csharp-tree-sitter-mode)))

If you are using this, clearly state so if you find any issues.

Note that we don't depend on tree-sitter yet, so you have to manually install the packages involved. The simplest way is to use the provided snippet above.

This package is currently available on both ELPA and MELPA. Install using M-x package-install<RET>csharp-mode.

Once installed the package should be automatically used for files with a '.cs'-extension.

Note: This package is also available on MELPA-stable for those who don't want or need bleeding edge development-versions.

For a better experience you may want to enable electric-pair-mode when editing C#-files. To do so, add the following to your .emacs-file:

(defun my-csharp-mode-hook ()
  ;; enable the stuff you want for C# here
  (electric-pair-mode 1)       ;; Emacs 24
  (electric-pair-local-mode 1) ;; Emacs 25
  )
(add-hook 'csharp-mode-hook 'my-csharp-mode-hook)

For further mode-specific customization, M-x customize-group RET csharp RET will show available settings with documentation.

For more advanced and IDE-like functionality we recommend using csharp-mode together with lsp-mode or eglot

The original csharp-mode repo contained lots of different code for lots of different purposes, some finished, some not, some experimental, some not. Basiaclly things like ASPX-mode, TFS-mode, code completion backends, etc.

All this original code can still be found in the extras-branch, but we have decided to go for a more focused approach and to throw out all dead or unused code, code we wont be maintaining.

The goal: That what we package in csharp-mode actually works and works well.