C#

var ms = new MemeoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.MemoryBmp);
byte[] byteArray = ms.ToArray();

System.IO.MemoryStream ms1 = new System.IO.MemoryStream();
Bitmap pic1 = new Bitmap(bild.Image);
pic1.Save(ms1, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] byteArray1 = ms1.ToArray();

System.IO.MemoryStream ms2 = new System.IO.MemoryStream();
Bitmap pic2 = DicePictures.Tarning1;
pic2.Save(ms2, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] byteArray2 = ms2.ToArray();

if (byteArray1 == byteArray2)
    Console.WriteLine("Equal");
else
    Console.WriteLine("Not equal");

bild.Image.Save(ms1, System.Drawing.Imaging.ImageFormat.MemoryBmp);

if(byteArray1 == byteArray2)

if(byteArray1.Length == byteArray2.Length)
{
   for(int i = 0; i < byteArray1.Length; i++)
   {
      if(byteArray1[i] != byteArray2[i])
         return false;
   }
   return true;
}
return false;

bild.Image.Save(ms1, System.Drawing.Imaging.ImageFormat.MemoryBmp);

Image img1 = pictureBox1.Image;
            Image img2 = pictureBox2.Image;

            MemoryStream ms1 = new MemoryStream(), ms2 = new MemoryStream();
            
            img1.Save(ms1, ImageFormat.Bmp);
            img2.Save(ms2, ImageFormat.Bmp);

            byte[] byteArray1, byteArray2;

            byteArray1 = ms1.ToArray();
            byteArray2 = ms2.ToArray();

            if (byteArray1.Length == byteArray2.Length)
            {
                for (int i = 0; i < byteArray1.Length; i++)
                {
                    if(byteArray1[i] != byteArray2[i])
                        MessageBox.Show("Not Same");
                }
                MessageBox.Show("Image Same");
            }
            else
                MessageBox.Show("Not Same");

bool b = false;
           for (int i = 0; i < 255; i++)
           {
               if (pictureBox_OK.Image.Palette.Entries[i] == Properties.Resources.OK.Palette.Entries[i])
               {
                   b = true;
               }
               else
               {
                   b = false;
                   break; // break the ( for (int i = 0; i &lt; 255; i++))
               }
           }