Read a password via command-line without showing the password

ReadPassword

public static string ReadPassword()
{ return ReadPassword('*'); }
public static string ReadPassword(char passwordchar)
{
    string pass = "";
    char c = Console.ReadKey(true).KeyChar;
    while(c != (char)0x0D)
    {
        if(c == 0x08)
        {
            if(pass.Length > 0)
            {
                pass = pass.Substring(0, pass.Length - 1);
                if(Console.CursorLeft == 0)
                {
                    Console.CursorLeft = Console.WindowWidth - 1;
                    Console.CursorTop--;
                    Console.Write(' ');
                    Console.CursorLeft = Console.WindowWidth - 1;
                    Console.CursorTop--;
                }
                else
                {
                    Console.CursorLeft--;
                    Console.Write(' ');
                    Console.CursorLeft--;
                }
            }
        }
        else
        {
            pass += c;
            Console.Write(passwordchar);
        }
        c = Console.ReadKey(true).KeyChar;
    }
    Console.WriteLine();
    return pass;
}