FAQ
Why not just grep the source files?
Grep finds text patterns. roslyn-codelens-mcp understands semantic structure — types, interfaces, inheritance, call graphs, DI registrations. Grep on IGreeter misses implementations that store the service under a different variable name, and can't answer "what calls this method" or "what implements this interface."
Does it support multiple solutions?
Yes. Use list_solutions, set_active_solution, load_solution, and unload_solution to manage multiple solutions. Only one is active at a time for tool calls.
How does hot reload work?
The server runs a FileChangeTracker that watches for file system changes. Saving a .cs file updates the Roslyn workspace automatically — no sync_documents call needed.
Why does find_references return nothing for an external type?
The package must be referenced by at least one project in the loaded solution. Call get_nuget_dependencies to check, then make sure the assembly name matches exactly.
How fast is it?
Solution load takes 5–30 seconds (once at startup). After that, most calls run in under 1ms–3ms. Heavier operations:
| Tool | Typical latency |
|---|---|
find_naming_violations | ~8ms |
find_references | ~3ms |
analyze_change_impact | ~4ms |
search_symbols | ~1.4ms |
Full benchmark results are in the repository.
What .NET versions are supported?
The server targets .NET 10 and can analyse solutions targeting any .NET version (net48, net6.0, net8.0, net10.0, etc.).