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);
            }

我的忽略控制字符和处理行换行:

public static string ReadLineMasked(char mask = '*')
{
    var sb = new StringBuilder();
    ConsoleKeyInfo keyInfo;
    while ((keyInfo = Console.ReadKey(true)).Key != ConsoleKey.Enter)
    {
        if (!char.IsControl(keyInfo.KeyChar))
        {
            sb.Append(keyInfo.KeyChar);
            Console.Write(mask);
        }
        else if (keyInfo.Key == ConsoleKey.Backspace && sb.Length > 0)
        {
            sb.Remove(sb.Length - 1, 1);

            if (Console.CursorLeft == 0)
            {
                Console.SetCursorPosition(Console.BufferWidth - 1, Console.CursorTop - 1);
                Console.Write(' ');
                Console.SetCursorPosition(Console.BufferWidth - 1, Console.CursorTop - 1);
            }
            else Console.Write("\b \b");
        }
    }
    Console.WriteLine();
    return sb.ToString();
}

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;
}

我只是改进代码从问我简单，只是工作

    string pass = ""; //create empty password string
    Console.Write("Enter your password: ");
    ConsoleKeyInfo key;
    int passLen = 0; // base password length

    do
    {
        key = Console.ReadKey(true); //reading keyboard key

        if (key.Key == ConsoleKey.Escape) Environment.Exit(0); // If key is escape console will close (optional)

        if (key.Key != ConsoleKey.Backspace && key.Key != ConsoleKey.Enter) // on key with is not bacspase and enter 
        {
            pass += key.KeyChar; //password string add key value
            Console.Write("*"); // and print star as masked char 
            passLen++; // upgrading password length
        }
        else if (passLen > 0 && key.Key == ConsoleKey.Backspace) //if password have a any symbol and u press Backspace
        {   
                Console.Write("\b \b"); //Backspace delete star symbol and coursor back in line 
                passLen--; // password length is one less
                pass = pass[0..^1]; // new string passowrd is string without last charter 
        }
    } 
    while (key.Key != ConsoleKey.Enter); // if you press enter this stop execute with your password

    Console.WriteLine();
    Console.WriteLine("The Password You entered is : " + pass);

(我的)nuget包来做这个，基于上面的答案:

安装包PanoramicData。ConsoleExtensions

用法:

using PanoramicData.ConsoleExtensions;

...

Console.Write("Password: ");
var password = ConsolePlus.ReadPassword();
Console.WriteLine();

项目网址:https://github.com/panoramicdata/PanoramicData.ConsoleExtensions

欢迎拉请求。