How can I place a border color in a pictureBox if the image loaded in it is from the resources?

I set my pictureBox with a default image from resources with this:

public Form1()
{
    InitializeComponent();
    pictureBox1.Image = Properties.Resources.default_Employee_Image;
}

when I check if the picture in the pictureBox is from resources with this code, it doesn't draw the border:

private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
    //pictureBox border color
    Color themeColor = Color.FromArgb(172, 188, 212);

    if (pictureBox1.Image == null) //if image from db is null display default image
    {
        pictureBox1.Image = Properties.Resources.default_Employee_Image;
    }

    //if image is the default image: paint border
    if (pictureBox1.Image == Properties.Resources.default_Employee_Image)
    {
        ControlPaint.DrawBorder(e.Graphics, pictureBox1.ClientRectangle, themeColor, ButtonBorderStyle.Solid);         
    }
}

Also if image from the pictureBox is default, I'll save it as null in my database.

I want to only have a border if the default image is loaded. If I select another image the border should be gone.

If the pictureBox has the default image it should look like this (which means that I still have not selected a picture of the user):

But if the picture in my pictureBox is not the default image-(the image in my resources), [This means that I already selected an image] it should look like this:

And not like this:

Solution

pictureBox1.Image == Properties.Resources.SomeImage will never return true, because every time that you call Properties.Resources.SomeImage, it returns a new instance of the image.

You don't need to track the assigned image; instead, you need to track the status. You can use either of the following options:

Rely on a flag: You can set a flag like bool isDefaultImage = true; at form level and if at some point of your application you changed the image, set it to true. Something like this:
```
 if(isDefaultImage)
 {
     //draw border
 }
```
Rely on Model/DataSource: You can also rely on your model/data source values and instead of checking UI elements, check if the user has a profile picture. Something like this:
```
 if(myUserObject.ProfilePicture == null)
 {
     //draw border
 }
```

Compare two images

Anyhow, just in case you are interested to compare two Image objects to see whether they are same Image, you can use the following method:

public bool AreImagesEqual(Image img1, Image img2)
{
    ImageConverter converter = new ImageConverter();
    byte[] bytes1 = (byte[])converter.ConvertTo(img1, typeof(byte[]));
    byte[] bytes2 = (byte[])converter.ConvertTo(img2, typeof(byte[]));
    return Enumerable.SequenceEqual(bytes1, bytes2);
}

Then you can use it like this:

using(var image = Properties.Resources.DefaultImage)
{
    var isDefaultImage = AreImagesEqual(pictureBox1.Image, image);
    if(isDefaultImage)
    {
        //draw border 
     }
}