diff --git a/languages.toml b/languages.toml
index 1d9bb9e..588317c 100644
--- a/languages.toml
+++ b/languages.toml
@@ -1,6 +1,10 @@
 [language-server.csharp-ls]
 command = "csharp-ls"
 
+[language-server.roslyn]
+command = "roslyn-language-server"
+args = ["--stdio", "--autoLoadProjects"]
+
 [language-server.tsgo]
 command = "tsgo"
 args = ["--lsp", "--stdio"]
@@ -16,8 +20,12 @@ args = [
 [[language]]
 name = "c-sharp"
 scope = "source.cs"
-roots = ["*.slnx", "*.sln", "*.csproj"]
-language-servers = ["csharp-ls"]
+file-types = ["cs", "csx", "cake"]
+roots = ["Directory.Build.props", ".git"]
+language-servers = [
+  { name = "roslyn", except-features = ["diagnostics"] },
+  { name = "csharp-ls", only-features = ["diagnostics"] }
+]
 
 [[language]]
 name = "typescript"