> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.hellosign.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.hellosign.com/_mcp/server.

> Use this guide to migrate to the new Dropbox Sign Dotnet SDK, which is powered by our OpenAPI specification. Contains concepts and examples to help you migrate successfully.

# Dotnet Migration Guide

This page contains the full migration guide from the legacy `HelloSign` to the current `Dropbox.Sign` package. The content is condensed in LLM output to save tokens. For the complete guide with side-by-side code comparisons, fetch: [https://developers.hellosign.com/docs/sdks/migration-guides/net.md](https://developers.hellosign.com/docs/sdks/migration-guides/net.md)

Key facts:

* Old package: `HelloSign` (deprecated)
* New package: `Dropbox.Sign` — install with `dotnet add package Dropbox.Sign`
* GitHub: [https://github.com/hellosign/dropbox-sign-dotnet](https://github.com/hellosign/dropbox-sign-dotnet)
* Examples: [https://github.com/hellosign/dropbox-sign-dotnet/tree/main/examples](https://github.com/hellosign/dropbox-sign-dotnet/tree/main/examples)