# A Self-Baked Async FFI Framework for Rust C# Interop

DevFeed: [A Self-Baked Async FFI Framework for Rust C# Interop](<https://devfeed.tech/articles/a-self-baked-async-ffi-framework-for-rust-c-interop-4882.md>)

Original publisher: [Read original article](<https://www.scylladb.com/2026/08/31/async-ffi-framework-for-rust-c-interop/>)

Author: Cynthia Dunlop

Published: 2026-08-31T13:00:34Z

Content type: article

Language: en

Sources: [ScyllaDB](<https://devfeed.tech/sources/scylladb.md>)

Topics: [Rust](<https://devfeed.tech/topics/rust.md>), [Tokio](<https://devfeed.tech/topics/tokio.md>), [.NET](<https://devfeed.tech/topics/net.md>), [C#](<https://devfeed.tech/topics/csharp.md>), [scylladb](<https://devfeed.tech/topics/scylladb.md>), [For the Love of Code](<https://devfeed.tech/topics/for-the-love-of-code.md>)

Tags: [c-sharp](<https://devfeed.tech/tags/c-sharp.md>), [drivers](<https://devfeed.tech/tags/drivers.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [hackathon](<https://devfeed.tech/tags/hackathon.md>), [interop](<https://devfeed.tech/tags/interop.md>), [rust](<https://devfeed.tech/tags/rust.md>), [scylladb](<https://devfeed.tech/tags/scylladb.md>)

## AI overview

The article describes ScyllaDB's effort to build a Rust-based driver architecture with thin language-binding layers, focusing on a C# driver. It explains the motivation for creating a custom asynchronous FFI framework to connect Rust's Tokio runtime with .NET's async runtime over the C ABI, after existing binding-generation tools proved insufficient for Rust-C# async interoperation.

## Source excerpt

How we got tokio and .NET's async runtime talking to each other, over the C ABI