# Support for .slnx and .slnf files **URL:** \ **Category:** Feature Requests\ **Tags:** language-servers, csharp, extensions\ **Created:** [May 28, 2026, 6:11pm UTC](https://forum.cursor.com/t/support-for-slnx-and-slnf-files/161831 "2026-05-28T18:11:05Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![lgeorgalas](https://avatars.discourse-cdn.com/v4/letter/l/d2c977/32.png) [@lgeorgalas](https://forum.cursor.com/u/lgeorgalas)\ **Post date:** [May 28, 2026, 6:11pm UTC](https://forum.cursor.com/t/support-for-slnx-and-slnf-files/161831/1 "2026-05-28T18:11:05Z")
### Feature request for product/service Anysphere Extensions (Remote SSH, Python, Dev Containers, WSL, C/C++/C#) ### Describe the request Support for .slnx and .slnf files in the Anysphere C# extension. Starting with .Net 10, .slnx is the default solution file format. The .slnf file format has been available for about 6 years now. Visual Studio, Rider, and Microsoft’s C# plugin for vscode all support the file format. Without being able to load my solution, many of the C# language features don’t work. ---
**Author:** ![mohitjain](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/mohitjain/32/100229_2.png) [@mohitjain](https://forum.cursor.com/u/mohitjain)\ **Post date:** [May 29, 2026, 5:56am UTC](https://forum.cursor.com/t/support-for-slnx-and-slnf-files/161831/6 "2026-05-29T05:56:32Z")
The Anysphere C# extension bundles a Roslyn/MSBuild version that predates .slnx/.slnf support. Updating it is part of a broader Roslyn version bump our team is aware of, which would also bring C# 14 language features. As a potential workaround, [DotRush](https://open-vsx.org/extension/nromanov/dotrush) is an alternative C# language server some community members have used for newer .NET support, though you’d lose integrated debugging. Related thread with more context: [C# Extension is Outdated](https://forum.cursor.com/t/c-extension-is-outdated/159391)