diff --git a/plugins/lsp/language-servers/default.nix b/plugins/lsp/language-servers/default.nix
index a54f01d3..5a4fe1f9 100644
--- a/plugins/lsp/language-servers/default.nix
+++ b/plugins/lsp/language-servers/default.nix
@@ -39,6 +39,12 @@ with lib; let
       description = "Enable cmake language server, for cmake files.";
       package = pkgs.cmake-language-server;
     }
+    {
+      name = "csharp-ls";
+      description = "Enable csharp-ls, for C#.";
+      package = pkgs.csharp-ls;
+      serverName = "csharp_ls";
+    }
     {
       name = "cssls";
       description = "Enable cssls, for CSS";
diff --git a/tests/test-sources/plugins/lsp/nvim-lsp.nix b/tests/test-sources/plugins/lsp/nvim-lsp.nix
index dfb22f54..bf534666 100644
--- a/tests/test-sources/plugins/lsp/nvim-lsp.nix
+++ b/tests/test-sources/plugins/lsp/nvim-lsp.nix
@@ -71,6 +71,8 @@
         clangd.enable = true;
         clojure-lsp.enable = true;
         cmake.enable = true;
+        # pkgs.csharp-ls only supports linux platforms
+        csharp-ls.enable = pkgs.stdenv.isLinux;
         cssls.enable = true;
         dartls.enable = true;
         denols.enable = true;