If I use the System.Process API in .NET and redirect the Stdin/Stdout to a stream inside my application, does the framework spawn an invisible console and scrap

If I use the System.Process API in .NET and redirect the Stdin/Stdout to a stream inside my application, does the framework spawn an invisible console and scrape the output? Or does this work differently? I always did it that way and thought the 3rd party terminal emulators also do that. Why do these emulators have to do it differently?