Login-Validation in Monodevelop

Login-Validation Account with Monodevelop:

This is a Login-Validation application where the user can insert their user name and password. If the user name & password inserted correctly then a welcome message displays.

Coding:

using System;
namespace login
{
class MainClass
{
public static void Main(string[] args)
{
Console.Clear();
Console.WriteLine("********** LOGIN ACOUNT **********");
Console.WriteLine("ENTER YOUR USER NAME :");
string user = Console.ReadLine();
Console.WriteLine("ENTER YOUR PASSWORD :");
string pass = Console.ReadLine();
if (user == "DEEPAK" || user == "deepak")
{
if (pass == "DWIJ" || pass == "dwij")
{
Console.WriteLine("*************** MCN SOLUTION WELCOME'S" + "\t" + user + "!!!!!!!!!!!!");
Console.WriteLine(" STRING CHOICES ");
Console.WriteLine("*------------------------------*");
Console.WriteLine(" 1.String Length");
Console.WriteLine(" 2.Treating Strings as Arrays");
Console.WriteLine(" 3.Concatenating Strings");
Console.WriteLine(" 4.Comparing String");
Console.WriteLine(" 5.String Replacement");
Console.WriteLine("*-------------------------------*");
Console.WriteLine("ENTER YOUR CHOICE");
int a = Convert.ToInt32(Console.ReadLine());
switch (a)
{
case 1: Console.WriteLine("Enter the String");
string slen = Console.ReadLine();
Console.WriteLine("String length is :" + slen.Length); break;
case 2: Console.WriteLine("Enter the String");
string s = Console.ReadLine();//Displays character
Console.WriteLine(s[2] + "\t" + "Displaying 3rd character of string "); //s[0],s[1].....s[n]
break;
case 3: Console.WriteLine("Enter the String");
string s1 = Console.ReadLine();
Console.WriteLine("Enter another String");
string s2 = Console.ReadLine();
Console.WriteLine(s1 + "\t" + s2);
break;
case 4: Console.WriteLine("Enter the String");
string s3 = Console.ReadLine();
Console.WriteLine("Enter another String");
string s4 = Console.ReadLine();
if (s3 == s4)
{
Console.WriteLine("Strings matched..");
}
else
{
Console.WriteLine("Strings dont matched..");
}
break;
case 5: Console.WriteLine("Enter the String");
string s5 = Console.ReadLine();
string news;
news = s5.Replace(s5, "---Love Is Blind---");
Console.WriteLine(news);
break;
default: Console.WriteLine("Invalid choice !"); break;
}
Console.WriteLine("***************************************");
Console.WriteLine("Thanks you !! DEEPAK DWIJ !!");
Console.Read();
}
}
else
{
Console.WriteLine(" Sorry !! invalid user & password : "+"\t"+user+"\t"+pass);
}
}
}
}