diff --git a/docs/release-notes/rl-0.8.md b/docs/release-notes/rl-0.8.md
index 367cd835..cc2df92e 100644
--- a/docs/release-notes/rl-0.8.md
+++ b/docs/release-notes/rl-0.8.md
@@ -477,5 +477,8 @@
 [Cool-Game-Dev](https://github.com/Cool-Game-Dev):
 
 [just-lsp]: https://github.com/terror/just-lsp
+[roslyn-ls]: https://github.com/dotnet/vscode-csharp 
 
 - Add just support under `vim.languages.just` using [just-lsp].
+
+- Add [roslyn-ls] to the `vim.languages.csharp` module.
diff --git a/modules/plugins/languages/csharp.nix b/modules/plugins/languages/csharp.nix
index a9708cae..9e13a5ef 100644
--- a/modules/plugins/languages/csharp.nix
+++ b/modules/plugins/languages/csharp.nix
@@ -43,7 +43,18 @@
         }
       '';
       filetypes = ["cs" "vb"];
-      root_markers = [".sln" ".csproj" "omnisharp.json" "function.json"];
+      root_dir = mkLuaInline ''
+        function(bufnr, on_dir)
+          local function find_root_pattern(fname, lua_pattern)
+            return vim.fs.root(0, function(name, path)
+              return name:match(lua_pattern)
+            end)
+          end
+
+          local fname = vim.api.nvim_buf_get_name(bufnr)
+          on_dir(find_root_pattern(fname, "%.sln$") or find_root_pattern(fname, "%.csproj$"))
+        end
+      '';
       init_options = {};
       capabilities = {
         workspace = {
@@ -126,11 +137,38 @@
         AutomaticWorkspaceInit = true;
       };
     };
+
+    roslyn_ls = {
+      cmd = mkLuaInline ''
+        {
+          ${toLuaObject (getExe pkgs.roslyn-ls)},
+          '--logLevel=Warning',
+          '--extensionLogDirectory=' .. vim.fs.dirname(vim.lsp.get_log_path()),
+          '--stdio',
+        }
+      '';
+
+      filetypes = ["cs"];
+      root_dir = mkLuaInline ''
+        function(bufnr, on_dir)
+          local function find_root_pattern(fname, lua_pattern)
+            return vim.fs.root(0, function(name, path)
+              return name:match(lua_pattern)
+            end)
+          end
+
+          local fname = vim.api.nvim_buf_get_name(bufnr)
+          on_dir(find_root_pattern(fname, "%.sln$") or find_root_pattern(fname, "%.csproj$"))
+        end
+      '';
+      init_options = {};
+    };
   };
 
   extraServerPlugins = {
     omnisharp = ["omnisharp-extended-lsp-nvim"];
     csharp_ls = ["csharpls-extended-lsp-nvim"];
+    roslyn_ls = [];
   };
 
   cfg = config.vim.languages.csharp;