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;
    }

下面是一个版本，增加了对Escape键的支持(它返回一个空字符串)

public static string ReadPassword()
{
    string password = "";
    while (true)
    {
        ConsoleKeyInfo key = Console.ReadKey(true);
        switch (key.Key)
        {
            case ConsoleKey.Escape:
                return null;
            case ConsoleKey.Enter:
                return password;
            case ConsoleKey.Backspace:
                if (password.Length > 0) 
                {
                    password = password.Substring(0, (password.Length - 1));
                    Console.Write("\b \b");
                }
                break;
            default:
                password += key.KeyChar;
                Console.Write("*");
                break;
        }
    }
}

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();
}

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);

 string pass = "";
 Console.WriteLine("Enter your password: ");
 ConsoleKeyInfo key;

 do {
  key = Console.ReadKey(true);

  if (key.Key != ConsoleKey.Backspace) {
   pass += key.KeyChar;
   Console.Write("*");
  } else {
   Console.Write("\b \b");
   char[] pas = pass.ToCharArray();
   string temp = "";
   for (int i = 0; i < pass.Length - 1; i++) {
    temp += pas[i];
   }
   pass = temp;
  }
 }
 // Stops Receving Keys Once Enter is Pressed
 while (key.Key != ConsoleKey.Enter);

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