Darrel Miller is a Program Manager at Microsoft responsible for developer tooling for the Microsoft Graph. He has been building distributed business applications on the Microsoft platform for more than 20 years. He is an active member of the .NET community and OSS contributor. He is a member of the OpenAPI Initiative Technical Steering Committee, and a member of the Microsoft OneAPI Council. He co-authored the O’Reilly book, Designing Evolvable Web APIs with ASP.NET.