The open-source .NET Language Server — C# and F# intelligence for every editor. Zero licenses. Zero vendor lock-in.
Features
- Code Completions — IntelliSense-quality completions powered by Roslyn
- Diagnostics — Real-time errors and warnings as you type
- Hover / Quick Info — Full type signatures, XML docs, and nullability annotations
- Go to Definition — Jump to source or decompiled metadata
- Document Symbols — Fast outline via tree-sitter
- Code Folding — Syntax-aware region folding
- F# Support — First-class F# via FSharp.Compiler.Service
- Solution Explorer — Tree view of your .sln/.slnx, projects, and symbols
- Profiler — Built-in .NET profiling, counter monitoring, and memory analysis
Profiler
SharpLsp wraps dotnet-trace, dotnet-counters, and dotnet-dump into a seamless editor experience. No terminal required.
Setup
Install the .NET diagnostic tools:
dotnet tool install -g dotnet-trace
dotnet tool install -g dotnet-counters
dotnet tool install -g dotnet-dump
Usage
Open the Profiler panel in the SharpLsp sidebar to see running .NET processes.
| Action | How |
|---|---|
| Trace performance | SharpLsp: Start Trace — select a process, trace runs until you stop it. Output opens in SpeedScope. |
| Monitor counters | SharpLsp: Start Counters — live-updating table of .NET performance counters in a webview panel. |
| Capture memory dump | SharpLsp: Collect Dump — choose Heap, Full, or Mini dump type. |
| Analyze heap | SharpLsp: Analyze Heap — select a .dmp file to see type counts and memory usage. |
All commands are available from the Command Palette (Ctrl+Shift+P / Cmd+Shift+P).
Requirements
- .NET SDK 10.0+
sharplspbinary (built from source or downloaded from releases)
Configuration
Configure via sharplsp.toml in your workspace root. See the full documentation for details.