How to Convert a Byte Array to Integer in C# ?

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

namespace AbundantcodeConsoleApp
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            byte[]  output = ConvertNumberToByteArray();
            Int32 num = ConvertByteArrayToInteger(output);
            Console.WriteLine(num);
            Console.ReadLine();
        }

        // Function to Convert Byte Array to Integer
        private static int ConvertByteArrayToInteger(byte[] output)
        {
            Int32 num = BitConverter.ToInt32(output, 0);
            return num;
        }

        // Function to Convert a Number to Byte Array

        private static byte[] ConvertNumberToByteArray()
        {
            Int32 Input = 75;
            byte[] ByteData = BitConverter.GetBytes(Input);
            return ByteData;
        }
    }
    
}