Question

How to get the first directory name in a relative path, given that they can be different accepted directory separators?

For example:

foo\bar\abc.txt -> foo
bar/foo/foobar -> bar

Answer 1

Works with both forward and back slash

static string GetRootFolder(string path)
{
    while (true)
    {
        string temp = Path.GetDirectoryName(path);
        if (String.IsNullOrEmpty(temp))
            break;
        path = temp;
    }
    return path;
}