case2, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            String firstString = "act";
            String secondString = "cat";
            
            char []first_char = firstString.ToCharArray();     // Converting string to char array
            char []second_char = secondString.ToCharArray();    // Converting string to char array
            
            
            Array.Sort(first_char);        // Sorting firstString characters
            Array.Sort(second_char);        // Sorting secondString characters
           
            
            
            Console.Write("firstString value after sorting= " ); Console.WriteLine(first_char);           // Checking output just for correction purpose
            Console.Write("SecondString value after sorting= "); Console.WriteLine(second_char);           // Checking   "     "    "     "            " 
             
            
            Console.WriteLine("Answer should be true, output is " + Array.Equals(first_char,second_char));        // Wrong Output you will get if you change cas to cat means act=act will return false;
            
      
            /*    For Rechecking purpose trying to compare two strings with String.Equals()     */
            
            
            String str= first_char.ToString();          // Converting char array to String
            String str3 = second_char.ToString();       // ""          ""    ""   ""   ""
            
            Console.WriteLine("Answer should be true, output is " + str.Equals(str3));  // Giving wrong output act=acs not True

}
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,2 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 17 Mb, average nr of threads: 3