C# Implementations CodeLens
Adds an inline "N implementations" CodeLens above C# interfaces, classes, and
overridable members — the row Rider's Code Vision gives you, which VS Code + C#
Dev Kit does not.
It reuses the data C# Dev Kit already computes for Go to Implementations
(vscode.executeImplementationProvider), so there is no separate language server
and no extra indexing. Clicking the lens opens a Peek view with the implementing
types.
The lens renders on the same line as C# Dev Kit's own "N references" lens, so you
get a combined N references | N implementations row.
Before — C# Dev Kit alone, references only:
Clicking the lens opens Peek with the implementing types:
Requirements
- C# Dev Kit (
ms-dotnettools.csdevkit) installed and working on your solution.
- VS Code
^1.90.0.
Settings
| Setting |
Default |
Meaning |
csharpImplementationsCodeLens.enabled |
true |
Show the lens. |
csharpImplementationsCodeLens.minCount |
1 |
Hide the lens when the implementation count is below this. |
csharpImplementationsCodeLens.maxFileLines |
2000 |
Skip files larger than this (performance guard). |
Build from source
pnpm install
pnpm run package # bundles to dist/extension.js
pnpm exec vsce package # -> csharp-implementations-codelens-0.0.1.vsix
code --install-extension csharp-implementations-codelens-0.0.1.vsix
Develop
pnpm install
pnpm run watch
Then press F5 to launch an Extension Development Host, open a C# solution, and
wait for C# Dev Kit to finish loading before the counts appear.
Notes
- Counts populate a few seconds after the solution loads; the extension re-fires
the lenses a few times after activation and once when C# diagnostics first
arrive.
- The declaration itself is excluded from the count (an interface with two
implementers shows
2, not 3).
- Implementation lookups are cached per symbol, so scrolling within a file costs
nothing. The cache is dropped when any C# file is saved, created, or deleted,
when the settings change, or after 60 seconds. Empty results are never cached
(they usually mean the language service is still warming up).
License
MIT
