diff --git a/pkgs/development/tools/language-servers/csharp-ls/default.nix b/pkgs/development/tools/language-servers/csharp-ls/default.nix
new file mode 100644
index 000000000000..efc6307f1a6c
--- /dev/null
+++ b/pkgs/development/tools/language-servers/csharp-ls/default.nix
@@ -0,0 +1,26 @@
+{ lib
+, buildDotnetGlobalTool
+, dotnetCorePackages
+}:
+let
+  inherit (dotnetCorePackages) sdk_7_0;
+in
+
+buildDotnetGlobalTool rec {
+  pname = "csharp-ls";
+  version = "0.8.0";
+
+  nugetSha256 = "sha256-F3N6ESE/VmQA5sOMm3eqSkhSNVCCsnAXTCC+McsAnQw=";
+
+  dotnet-sdk = sdk_7_0;
+  dotnet-runtime = sdk_7_0;
+
+  meta = with lib; {
+    description = "Roslyn-based LSP language server for C#";
+    homepage = "https://github.com/razzmatazz/csharp-language-server";
+    changelog = "https://github.com/razzmatazz/csharp-language-server/releases/tag/v${version}";
+    license = licenses.mit;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ GaetanLepage ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 95fba439b15e..acd6de9e5b04 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -786,6 +786,8 @@ with pkgs;
 
   # Dotnet
 
+  csharp-ls = callPackage ../development/tools/language-servers/csharp-ls { };
+
   dotnetCorePackages = recurseIntoAttrs (callPackage ../development/compilers/dotnet {});
 
   dotnet-sdk_2 = dotnetCorePackages.sdk_2_1;