Non-Echoing Console Input

I recently stumbled upon the need to create a small console application that reads in a password from the user. Naturally, I didn't want the password to be echoed back into the console as it was typed, luckily there's a static method called ReadKey in the Console class, but in order to read a whole string, some acrobatics is required:

string ReadPassword()

{

    string passwordString;

    List<char> chList = new List<char>();

    ConsoleKeyInfo cki = Console.ReadKey(true);

    while (cki.Key != ConsoleKey.Enter)

    {

        if (cki.Key == ConsoleKey.Backspace)

        {

            if (chList.Count > 0)

                chList.RemoveAt(chList.Count - 1);

        }

        else

            chList.Add(cki.KeyChar);

        cki = Console.ReadKey(true);

    }

    passwordString = new string(chList.ToArray());

    return passwordString;

}