s&box: .NET API whitelist — blocked APIs and their s&box equivalents (System.IO, HttpClient, Reflection)

In s&box, the .NET API is sandboxed — many standard .NET types and namespaces are blocked for security. Developers get confusing compile errors when trying to use System.IO, System.Reflection, System.Threading.Thread, System.Net, System.Diagnostics.Process, and other restricted APIs. The whitelist is enforced at compile time.