8.31 - File comparer

Objetive

Create a C# program to tell if two files (of any kind) are identical (have the same content).

Solution

using System;
using System.IO;

namespace FileComparer
{
    class Program
    {
        static void Main(string[] args)
        {
            bool equal = true;

            FileStream myFile1;
            byte[] dataFile1;
            FileStream myFile2;
            byte[] dataFile2;

            Console.Write("Enter the name of file1: ");
            string fileName1 = Console.ReadLine();

            Console.Write("Enter the name of file2: ");
            string fileName2 = Console.ReadLine();

            if ( (!File.Exists(fileName1)) || (!File.Exists(fileName2)) )
            {
                Console.WriteLine("The file 1 or file 2 not exists!!!");
                return;
            }

            try
            {
                myFile1 = File.OpenRead(fileName1);
                dataFile1 = new byte[myFile1.Length];
                myFile1.Read(dataFile1, 0, (int)myFile1.Length);
                myFile1.Close();

                myFile2 = File.OpenRead(fileName2);
                dataFile2 = new byte[myFile2.Length];
                myFile2.Read(dataFile2, 0, (int)myFile2.Length);
                myFile2.Close();

                if (myFile1.Length == myFile2.Length)
                    for (int i = 0; i < dataFile1.Length; i++)
                        if (dataFile1[i] != dataFile2[i])
                            equal = false;
                else
                    equal = false;
               
                if (equal)
                    Console.WriteLine("The {0} is equal {1}", fileName1, fileName2);
                else
                    Console.WriteLine("The {0} not is equal {1}", fileName1, fileName2);

                Console.ReadLine();
            }
            catch (Exception e)
            {
                Console.WriteLine("Error: {0}!!!", e.Message);
            }
        }
    }
}


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