I am just learning C#

how to clear a cmd line after wrong entry like wrong user name or password in C sharp?

my codes here, have a look thanks
----------------------------------------

using System;
using System.Collections.Generic;
using System.Text;

namespace DisplayLogin
{
    class Program
    {
       
        static void Main()
        {


            Console.WriteLine("________________________________________________");
            Console.WriteLine("");
            {
                AdminName();
            }
            Console.WriteLine("");
            
        }
        static void AdminName()
        {
            Console.Write("\tAdmin name:");
            string adminName = Console.ReadLine();

            if (adminName == "user")
            {
                Console.WriteLine("");
                PassWord();
            }
            else
            {

                Console.WriteLine(""); 
                Console.WriteLine("\tInvalid Entry! Try again");//I need to clear all previous entry
                Console.WriteLine("");
                AdminName();
            }

        }

        static void PassWord()
        {
            Console.Write("\tPassword:");
            string passWord = Console.ReadLine();
            if (passWord == "123456")
            {
                Console.WriteLine("");


                Console.WriteLine("________________________________________________");
                Console.WriteLine("");

                //CreateAccount();
            }
            else
            {

                Console.WriteLine("");
                Console.WriteLine("\tInvalid Password! Try again");//I need to clear all previous entry
                Console.WriteLine("");
                PassWord();
            }
        }

        
    }
}
Console.Clear();

here a complete example :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("some stuff");
            Console.ReadLine();
            Console.WriteLine("some more stuff");
            Console.ReadLine();
            Console.Clear();
        }
    }
}

Try this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace daniweb.console
{
  class Program
  {
    static void Main(string[] args)
    {
      bool loggedIn = default(bool);
      while (!loggedIn)
      {
        string userName = GetUserName(); //only returns if successful
        string password = GetPassword();
        loggedIn = ValidPassword(userName, password);
        if (!loggedIn)
        {
          Console.WriteLine("Invalid password");
          Console.WriteLine(string.Empty);
          Console.WriteLine("Press any key to continue");
          Console.ReadKey();
          Console.Clear();
        }
      }

      throw new NotImplementedException("They are logged in at this point");
    }

    static string GetUserName()
    {
      string res = default(string);
      while (!ValidUser(res))
      {
        if (res != null)
        {
          Console.WriteLine("Invalid username");
          Console.WriteLine(string.Empty);
          Console.WriteLine("Please any key to continue");
          Console.ReadKey();
          Console.Clear();
        }
        Console.Write("User: ");
        res = Console.ReadLine();
      }
      return res;
    }

    static string GetPassword()
    {
      string res = default(string);
      Console.Write("Password: ");
      res = Console.ReadLine();
      return res;
    }

    static bool ValidUser(string UserName)
    {
      return (string.Compare(UserName, "admin", true) == 0);
    }

    static bool ValidPassword(string UserName, string Password)
    {
      if (string.Compare(UserName, "admin", true) == 0)
        return (string.Compare(Password, "123456", true) == 0);
      else
        return false;
    }

  }
}

Thanks a lot friends, 'Sknake's' I will try your program tomorrow,,,now so sleepy. It seems I can use your code,,,,is it okey??? .....Thanks in advance.
Xavier

Hi Serkan Sendur, yours is good and simple,I tried and working. I just haven't tried the other one need time to understand. Thanks bro.

dont forget, the shorter is the better(sknake just likes writing code too much ;))
And please mark this thread as saved.

dont forget, the shorter is the better(sknake just likes writing code too much ;))
And please mark this thread as saved.

:P
Sometimes I get a little bored and need things to do... what can I say.

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