Question

Is it possible to save a list of files into one MemoryStream and save the files later back to the disc?

Answer 1

Well yeah, there are a few ways of doing this but one would be to do something like this:

class MyFile
{
    public byte[] Data;
    public string FileName;
}

List<MyFile> files = GetFiles();
using (MemoryStream stream = new MemoryStream())
{
    // Serialise
    BinaryFormatter formatter = new BinaryFormatter();
    formatter.Serialize(stream, files);

    // Deserailise
    stream.Position = 0;
    List<MyFile> deserialisedFiles = (List<MyFile>)formatter.Deserialize(stream);
    SaveFiles(deserialisedFiles);
}

Where you should be able to figure out roughly the implementation of SaveFiles and GetFiles. I’m not entirely clear why you want to do this though.