采取顶部的答案，以及从其评论的建议，并将其修改为使用SecureString而不是String，测试所有控制键，而不是错误或在密码长度为0时向屏幕写入额外的“*”，我的解决方案是:

public static SecureString getPasswordFromConsole(String displayMessage) {
    SecureString pass = new SecureString();
    Console.Write(displayMessage);
    ConsoleKeyInfo key;

    do {
        key = Console.ReadKey(true);

        // Backspace Should Not Work
        if (!char.IsControl(key.KeyChar)) {
            pass.AppendChar(key.KeyChar);
            Console.Write("*");
        } else {
            if (key.Key == ConsoleKey.Backspace && pass.Length > 0) {
                pass.RemoveAt(pass.Length - 1);
                Console.Write("\b \b");
            }
        }
    }
    // Stops Receving Keys Once Enter is Pressed
    while (key.Key != ConsoleKey.Enter);
    return pass;
}

呀的家伙

    static string ReadPasswordLine()
    {
        string pass = "";
        ConsoleKeyInfo key;
        do
        {
            key = Console.ReadKey(true);
            if (key.Key != ConsoleKey.Enter)
            {
                if (!(key.KeyChar < ' '))
                {
                    pass += key.KeyChar;
                    Console.Write("*");
                }
                else if (key.Key == ConsoleKey.Backspace && pass.Length > 0)
                {
                    Console.Write(Convert.ToChar(ConsoleKey.Backspace));
                    pass = pass.Remove(pass.Length - 1);
                    Console.Write(" ");
                    Console.Write(Convert.ToChar(ConsoleKey.Backspace));
                }
            }
        } while (key.Key != ConsoleKey.Enter);
        return pass;
    }

为此，您应该使用System.Security.SecureString

public SecureString GetPassword()
{
    var pwd = new SecureString();
    while (true)
    {
        ConsoleKeyInfo i = Console.ReadKey(true);
        if (i.Key == ConsoleKey.Enter)
        {
            break;
        }
        else if (i.Key == ConsoleKey.Backspace)
        {
            if (pwd.Length > 0)
            {
                pwd.RemoveAt(pwd.Length - 1);
                Console.Write("\b \b");
            }
        }
        else if (i.KeyChar != '\u0000' ) // KeyChar == '\u0000' if the key pressed does not correspond to a printable character, e.g. F1, Pause-Break, etc
        {
            pwd.AppendChar(i.KeyChar);
            Console.Write("*");
        }
    }
    return pwd;
}

您可以将键附加到一个累加链表中。

当接收到退格键时，从列表中删除最后一个键。

当您接收到enter键时，将列表折叠成字符串并执行其余工作。

读取控制台输入是困难的，你需要处理特殊的键，如Ctrl, Alt，还有光标键和退格/删除。在一些键盘布局中，像瑞典式Ctrl甚至需要输入直接存在于美国键盘上的键。我相信尝试使用“低级”console . readkey (true)来处理这个问题是非常困难的，所以最简单和最健壮的方法是在输入密码时禁用“控制台输入回声”，使用一点WINAPI。

下面的示例是基于从std::cin问题读取密码的答案。

    private enum StdHandle
    {
        Input = -10,
        Output = -11,
        Error = -12,
    }

    private enum ConsoleMode
    {
        ENABLE_ECHO_INPUT = 4
    }

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern IntPtr GetStdHandle(StdHandle nStdHandle);

    [DllImport("kernel32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool GetConsoleMode(IntPtr hConsoleHandle, out int lpMode);

    [DllImport("kernel32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool SetConsoleMode(IntPtr hConsoleHandle, int dwMode);

    public static string ReadPassword()
    {
        IntPtr stdInputHandle = GetStdHandle(StdHandle.Input);
        if (stdInputHandle == IntPtr.Zero)
        {
            throw new InvalidOperationException("No console input");
        }

        int previousConsoleMode;
        if (!GetConsoleMode(stdInputHandle , out previousConsoleMode))
        {
            throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not get console mode.");
        }

        // disable console input echo
        if (!SetConsoleMode(stdInputHandle , previousConsoleMode & ~(int)ConsoleMode.ENABLE_ECHO_INPUT))
        {
            throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not disable console input echo.");
        }

        // just read the password using standard Console.ReadLine()
        string password = Console.ReadLine();

        // reset console mode to previous
        if (!SetConsoleMode(stdInputHandle , previousConsoleMode))
        {
            throw new Win32Exception(Marshal.GetLastWin32Error(), "Could not reset console mode.");
        }

        return password;
    }

如果我理解正确，你试图使退格删除屏幕上可见的*字符和缓存字符在你的传递变量?

如果是这样，那么只需将你的else块更改为:

            else
            {
                Console.Write("\b");
                pass = pass.Remove(pass.Length -1);
            }