Read password from console

ReadPassword.cs

/// <summary>
/// Read password from console
/// </summary>
/// <param name="prompt">Password prompt</param>
/// <param name="mask">Password mask char, usually '*'</param>
/// <returns>Password</returns>
public static string ReadPassword(string prompt, char mask)
{
    Stack<String> pwdStack = new Stack<String>();
    if (!String.IsNullOrEmpty(prompt))
    {
        Console.Write(prompt);
        if (!prompt.EndsWith(" "))
            Console.Write(' ');
    }
    for (ConsoleKeyInfo cki = Console.ReadKey(true); cki.Key != ConsoleKey.Enter; cki = Console.ReadKey(true))
    {
        if (cki.Key == ConsoleKey.Backspace)
        {
            if (pwdStack.Count > 0)
            {
                pwdStack.Pop();
                if (mask != '\0' &&
                    mask > ' ')
                {
                    Console.SetCursorPosition(Console.CursorLeft - 1, Console.CursorTop);
                    Console.Write(' ');
                    Console.SetCursorPosition(Console.CursorLeft - 1, Console.CursorTop);
                }
            }
        }
        else
        {
            if (cki.KeyChar != '\0' &&
                cki.KeyChar > ' ')
            {
                pwdStack.Push(cki.KeyChar.ToString());
                if (mask != '\0' &&
                    mask > ' ')
                    Console.Write(mask);
            }
        }
    }
    Console.WriteLine();
    return String.Join(String.Empty, pwdStack.ToArray().Reverse());
}