The .NET team has released preview2 of .NET 10 with new features and improvements.Dev containers are isolated environments for developers to work on projects without dealing with dependencies.They are useful for trying new technologies as they offer a reproducible setup.Different types of .NET container images are available for various scenarios like development and production.To explore a new .NET release, a dev container image with the .NET SDK and runtime is recommended.Setting up a dev container requires Docker and Visual Studio Code with Dev Containers extension.Customizing a dev container involves creating a Dev Container Configuration and adding a Dockerfile.Additional configuration options for dev containers include specifying extensions and features.Post-create commands can be used to run setup scripts after the dev container is created.Building and starting your dev container can be done using 'Dev Containers: Open Folder in Container' command.