1. I have some picture files on hand. I want to convert them into Image objects in c, and then use them.

public static System.Drawing.Image FromFile (string filename);

For example, create a winform project and set the background image of the form.

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            Image image = Image.FromFile("Image.png");
            this.BackgroundImage = image;
        }
    }

Operation effect:

2. Picture storage

1. The image object is saved as a byte array, and then stored in a file or database.

using (var memoryStream = new MemoryStream())
            {
                var image = Image.FromFile("Image.png");
                image.Save(memoryStream, ImageFormat.Png);
                var byteArr = memoryStream.ToArray();
            }

2. Data read from files or databases can also be converted into Image objects.

var image1 = new ImageConverter().ConvertFrom(byteArr);
this.BackgroundImage = (Image)image1;

Directly reading binary data stored in Image file can also be converted into Image object.

var originByte = File.ReadAllBytes("Image.png");
var image1 = new ImageConverter().ConvertFrom(originByte);
this.BackgroundImage = (Image)image1;

Compare the binary data of the two, there are still differences. The Image object has a larger amount of data. But both kinds of data can be correctly parsed by ImageConverter.

 private void button1_Click(object sender, EventArgs e)
        {
            using (var memoryStream = new MemoryStream())
            {
                var image = Image.FromFile("Image.png");
                image.Save(memoryStream, ImageFormat.Png);
                var byteArr = memoryStream.ToArray();

                var originByte = File.ReadAllBytes("Image.png");
                WriteData("imageObj.txt", byteArr);
                WriteData("originFile.txt", originByte);
            }
        }

        private static void WriteData(string filename, byte[] target)
        {
            var list = new List<string>();
            for (var i = 0; i < target.Length; i++)
            {
                list.Add($"{i}-->{target[i]}");
            }
            File.AppendAllLines(filename, list);
        }

I changed a very small picture for comparison. You can refer to the comparison fragment, which is different after the 36th byte.