C#

foreach (Control c in this.Controls)
{
   PictureBox pic = c as PictureBox;
   if (pic != null)
      ...
}

PictureBox pic = new PictureBox();
pic.Image = ...; // load your image instance from where ever you wish
Controls.Add(pic);

List<Image> images = new List<Image>();
images.Add(...); // add images

PictureBox pic;
for (int i = 1; i < 16; i++)
{
    foreach (Control cont in this.Controls)
    {
         if (cont is PictureBox)
         {
               pic = cont as PictureBox;
               if (pic.Name.EndsWith(i.ToString()))
                      images.Add(pic);
         }
    }
}

int picCounter = 1;
foreach (Control cont in this.Controls)
{
     if (cont is PictureBox)
     {
           pic = cont as PictureBox;
           if (pic.Name.EndsWith(picCounter.ToString()))
                  images.Add(pic);

           picCounter++;
     }
}

Sajjad Izadi wrote:

except the Tag solution, do you offer anything else?

Sajjad Izadi wrote:

why just 'foreach'? you mean without the extern 'for'? i can't find out why.

foreach (Control cont in this.Controls)
{
     if (cont is PictureBox)
     {
           pic = cont as PictureBox;
           if(pic != null)
           {
              string tag = pic.Tag as string;
      int number = int.Parse(tag); // this might fail, add a check here
      if (tag != null && number >= 1 && number <= 16)
         Console.WriteLine(number);
           }
     }
}