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using System;

class MainClass {
  public static void Main (string[] args) {
    Console.Write("password: ");
    string password = null;
    while (true){
      var key = Console.ReadKey(true);
      Console.Write("*");
      password += key.KeyChar;
      if (key.Key == ConsoleKey.Enter)
      break;
    }
  }
}
while (true){

我试图让它读取输入的密钥,然后打印一个'*',但它只是无休止地打印*

var key = Console.ReadKey(true);
Console.Write("*");
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