I need to create a program, thats receive a base64 image, need to resize and then need to make a new one 164px*164px and other 320px*320px. and then upload to azure container

// We need to create a program, that's receive a base64 image, 
// need to resize and then need to make a new one  164px*164px 
// and other 320px*320px. and then upload to azure container 
using System;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using Microsoft.WindowsAzure.Storage.Blob;

namespace Base64ToPng
{
    class Program
    {
        static void Main(string[] args)
        {
            string base64String = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";
            if (base64String.Length % 4 > 0)
            {
                base64String += new string