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PlantUML source code.

@startuml
package System
{
  interface MarshalByRefObject
  interface IAsyncDisposable
  interface IDisposable

  package IO
  {
    abstract class System.IO.Stream implements System.MarshalByRefObject, System.IAsyncDisposable, System.IDisposable
    class BufferedStream extends Stream
    class Compression.BrotliStream extends Stream
    class Compression.DeflateStream extends Stream
    class Compression.GZipStream extends Stream
    class Compression.ZLibStream extends Stream
    class FileStream extends Stream
    class MemoryStream extends Stream
    class Pipes.PipeStream extends Stream
    class UnmanagedMemoryStream extends Stream

    class System.Printing.PrintQueueStream extends Stream
    class System.Security.Cryptography.CryptoStream extends Stream
  }

  package Net
  {
    class Quic.QuicStream extends System.IO.Stream
    class Security.AuthenticatedStream extends System.IO.Stream
    class Sockets.NetworkStream extends System.IO.Stream
  }
}
@enduml