Question

I currently have a C# form, although I would like to find out how I can display a cycle through of all file and folders on the computer e.g.

A text box, going through all files and folders and showing them one by one, but only one one line (so not to keep all of them in memory)

Answer 1

A iterator could do the trick. Only the most recent results would be stored in memory.

public class FileSystemList : IEnumerable<string>
{
    DirectoryInfo rootDirectory;

    public FileSystemList(string root) 
    {
         rootDirectory = new DirectoryInfo(root);
    }

    public IEnumerator<string> GetEnumerator() 
    {
        return ProcessDirectory(rootDirectory).GetEnumerator();
    }

    public IEnumerable<string> ProcessDirectory(DirectoryInfo dir) 
    {
        yield return dir.FullName;
        foreach (FileInfo file in dir.EnumerateFiles())
            yield return file.FullName;
        foreach (DirectoryInfo subdir in dir.EnumerateDirectories())
            foreach (string result in ProcessDirectory(subdir))
                yield return result;
    }

    IEnumerator IEnumerable.GetEnumerator() 
    {
        return GetEnumerator();
    }
}