using System;
//csc string_empty.cs
namespace ex_empty
{
public class MyClass
{
public string process(string s1, string s2)
{
string error="";

if((s1 !="")&(s2 != ""))
{
Console.WriteLine("--Compare frist with second---");
int n = s1.CompareTo(s2);
if (n==0){ Console.WriteLine("Matched "); error = "Logged In " ;}
else if(n>0){Console.WriteLine("Did not Match: Value is more"); error = " Sorry ";}
else if(n<0){Console.WriteLine("Did not Match: Value is less"); error = " Sorry ";}
Console.WriteLine("--Compare second with first---");
int n2 = s2.CompareTo(s1);
if (n2==0){ Console.WriteLine("Matched ");}
else if(n2>0){Console.WriteLine("Did not Match: Value is more ");error = " Sorry ";}
else if(n2<0){Console.WriteLine("Did not Match: Value is less ");error = " Sorry ";}

}//end of if Block
else
{
Console.WriteLine("There is an error in your login : {0},{1},{2}" , s1 , ":" , s2 );
if (s1== String.Empty){ Console.WriteLine(" 1st string empty");}
if (s2== String.Empty){ Console.WriteLine(" 2nd string empty");}
//error = "reenter your data :" ;
error = String.Empty;
}
return error;
}

}
public class test
{
public static void Main()
{
Console.Write("Enter a your password : ");
string str1 = Console.ReadLine();
Console.Write("Repeat your password : ");
string str2 = Console.ReadLine();
MyClass my = new MyClass();
Console.Write("Back to Main : " + my.process(str1, str2));
Console.ReadLine();
}
}
}