下面是我的简单版本。 每次你按下一个键，从控制台删除所有，并绘制尽可能多的'*'作为密码字符串的长度。

int chr = 0;
string pass = "";
const int ENTER = 13;
const int BS = 8;

do
{
   chr = Console.ReadKey().KeyChar;
   Console.Clear(); //imediately clear the char you printed

   //if the char is not 'return' or 'backspace' add it to pass string
   if (chr != ENTER && chr != BS) pass += (char)chr;

   //if you hit backspace remove last char from pass string
   if (chr == BS) pass = pass.Remove(pass.Length-1, 1);

   for (int i = 0; i < pass.Length; i++)
   {
      Console.Write('*');
   }
} 
 while (chr != ENTER);

Console.Write("\n");
Console.Write(pass);

Console.Read(); //just to see the pass

这将用一个红色方块掩盖密码，然后在输入密码后恢复到原来的颜色。

它不会阻止用户使用复制/粘贴来获取密码，但如果它只是为了阻止别人从你的身后看，这是一个很好的快速解决方案。

Console.Write("Password ");
ConsoleColor origBG = Console.BackgroundColor; // Store original values
ConsoleColor origFG = Console.ForegroundColor;

Console.BackgroundColor = ConsoleColor.Red; // Set the block colour (could be anything)
Console.ForegroundColor = ConsoleColor.Red;

string Password = Console.ReadLine(); // read the password

Console.BackgroundColor= origBG; // revert back to original
Console.ForegroundColor= origFG;

(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。

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);

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;
}