.NET News April 2025: OSS licensing debates, .NET 10 Preview 3, and Rider 2025.1

April 2025 was the month the .NET ecosystem's OSS sustainability debate went very public. MediatR, AutoMapper, and MassTransit announced commercial licensing moves. Wolverine and Marten explicitly did not. Plus .NET 10 Preview 3 and Rider 2025.1.