Question

How to compare two byte arrays in C#

Answer 1

using System;
using System.Linq;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            var arr1 = new byte[] { 1, 2, 3, 4, 5 };
            var arr2 = new byte[] { 1, 2, 3, 4, 5 };

            var b = arr1.SequenceEqual(arr2);

            Console.WriteLine(b);
        }
    }
}


/*
run:
 
True
 
*/

 

70+ SQL courses for beginners and professionals

Answer 2

using System;
using System.Linq;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            var arr1 = new byte[] { 1, 2, 3, 4, 5 };
            var arr2 = new byte[] { 1, 2, 3, 4, 7 };

            var b = arr1.SequenceEqual(arr2);

            Console.WriteLine(b);
        }
    }
}


/*
run:
 
False
 
*/

 

70+ SQL courses for beginners and professionals

Answer 3

using System;
using System.Runtime.InteropServices;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        [DllImport("msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
        static extern int memcmp(byte[] arr1, byte[] arr2, long count);

        static void Main(string[] args)
        {
            var arr1 = new byte[] { 1, 2, 3, 4, 5 };
            var arr2 = new byte[] { 1, 2, 3, 4, 5 };

            bool b = arr1.Length == arr2.Length && memcmp(arr1, arr2, arr2.Length) == 0;

            Console.WriteLine(b);
        }
    }
}


/*
run:
 
True
 
*/

 

70+ SQL courses for beginners and professionals

Answer 4

using System;
using System.Collections;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            var arr1 = new byte[] { 1, 2, 3, 4, 5 };
            var arr2 = new byte[] { 1, 2, 3, 4, 5 };

            bool b = StructuralComparisons.StructuralEqualityComparer.Equals(arr1, arr2);

            Console.WriteLine(b);
        }
    }
}


/*
run:
 
True
 
*/

 

70+ SQL courses for beginners and professionals