C# '..' directory exists somehow

Question

So I'm currently working on a Console application and I have a navigation system with the 'cd' command to move up. To make sure you haven't entered a path I check for the directory with Directory.Exists("..") , but this returns true in some way. Even if I enter that in the Immediate window in Visual Studio it returns true, and I'm not sure what is causing that.
Any help is welcome

A code example:

    string path = "..";
    if (Directory.Exists(path))
        // Some code that shouldn't run but does
    else
        // Some more code that should run but doesn't
``

Answer 1

So as you can read in the comments, '..' means the parent directory, so it of course Directory.Exists("..") returns true. I didn't know this was a thing in C#, but this saves me some code and time, Again thanks everybody for the help