# Page Not Found

The URL `api-documentation/csharp/yarn/yarn.header/yarn.header.key` does not exist.

You might be looking for one of these pages:
- [Key](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.header/yarn.header.key.md)
- [Parser](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.header/yarn.header.parser.md)
- [Clone()](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.header/yarn.header.clone.md)
- [Value](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.header/yarn.header.value.md)
- [WriteTo(pb::CodedOutputStream)](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.header/yarn.header.writeto.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.yarnspinner.dev/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.yarnspinner.dev/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/3.1/api/csharp/yarn/yarn.header/yarn.header.key.md`)
- Use `Accept: text/markdown` header for content negotiation