This plugin adds support for the new Roslyn-based C# language server introduced in the vscode C# extension.

Ideally I would like to depend on the Dotnet SDK and everything else to be optional. But for now:

• Dotnet SDK (Tested with .net7).
• nvim-lspconfig for some path utility functions.
• Neovim nightly required. Tested on 831d662ac6756cab4fed6a9b394e68933b5fe325 but anything after August 2023 would probably work.

Just install jmederosalvarado/roslyn.nvim using your plugin manager.

require("roslyn").setup({
    dotnet_cmd = "dotnet", -- this is the default
    roslyn_version = "4.8.0-3.23475.7", -- this is the default
    on_attach = <on_attach you would pass to nvim-lspconfig>, -- required
    capabilities = <capabilities you would pass to nvim-lspconfig>, -- required
})

Before trying to use the language server you should install it. You can do so by running :CSInstallRoslyn which will install the configured version of the plugin in neovim's datadir.

1. Upon opening a C# file, the plugin will look for a .sln file in parent directories until it finds one. Make sure to have a .sln file somewhere in a parent dir, there is no support yet for .csproj only projects.
2. If it only finds one .sln file, it will use that to start the server. If it finds multiple, it will ask you to choose one before starting the server. When multiple .sln files are found for a file, you can use the command :CSTarget to change the target for the buffer at any point.
3. You'll see two notifications if everything goes well. The first one will say Roslyn client initialized for target <target>, which means the server is running, but it will just start indexing your sln. The second one will say Roslyn project initialization complete, it means that the server indexed your sln, only after you see the second notification will the go to definition and other lsp features be available.

Please note that some features from the vscode extension might not yet be supported by this plugin. Most of them are part of the roadmap, however I don't use vscode myself, so I'm not aware of all the features available, feel free to open an issue if you notice something is missing.