Formats C# fenced code blocks in Markdown files — without touching anything outside the block.
The VS Code C# extension provides full language server formatting for .cs files, but that formatting doesn't reach into code blocks embedded in Markdown. This extension fills that gap.
Usage
- Place your cursor anywhere inside a
```csharp or ```cs block
- Press Ctrl+Shift+Alt+F (Windows/Linux) or Cmd+Shift+Alt+F (Mac)
Or open the Command Palette (Ctrl+Shift+P) and run Format C# Code Block.
Before & After
Before:
public class Order {
public string Id { get; set; }
public List<OrderLine> Lines { get; set; }
public decimal Total() {
decimal sum = 0;
foreach (var line in Lines) {
sum += line.Quantity * line.UnitPrice;
}
return sum;
}
}
After:
public class Order {
public string Id { get; set; }
public List<OrderLine> Lines { get; set; }
public decimal Total() {
decimal sum = 0;
foreach (var line in Lines) {
sum += line.Quantity * line.UnitPrice;
}
return sum;
}
}
Configuration
Both settings are available in the VS Code Settings UI under C# Markdown Formatter, or in your settings.json:
| Setting |
Options |
Default |
Description |
csharpMarkdown.indentStyle |
"tabs" / "spaces" |
"tabs" |
Whether to indent with tabs or spaces |
csharpMarkdown.indentSize |
1–8 |
4 |
Spaces per indent level (ignored when using tabs) |
Example — switch to 2-space indentation:
"csharpMarkdown.indentStyle": "spaces",
"csharpMarkdown.indentSize": 2
- Brace indentation (
{ / }) and nesting
- Preserves blank lines
- Ignores braces inside strings and
// line comments
- Ignores braces inside
/* */ block comments
- Ignores braces inside verbatim strings (
@"...")
Known limitations
- Does not reformat spacing within a line (e.g. around operators) — indentation only
- Multi-line interpolated strings containing
{ or } may confuse the indenter
- Not a full language parser; complex edge cases may need manual correction
Notes
This extension does not require the C# Dev Kit or any other extension. It works entirely through the VS Code API with no external dependencies.
This extension was developed with AI assistance. Contributions and bug reports welcome.
