/*Абсолютно ненужный кусок кода, который решает проблему*/
            foreach (Element element in collection)
            { 
                double d = frag.X1; 
            }

	    foreach (Element elem in collection)
            {
                Element closureVariable = elem;

                System.Drawing.Rectangle rect = new System.Drawing.Rectangle(
                    closureVariable.X1,            
                    closureVariable.Y1, 
                    closureVariable.Width, 
                    closureVariable.Height);
            }

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var lst = new[]
                {
                    new Element() {X1 = 10, Y1 = 10, Width = 100, Height = 100},
                    new Element() {X1 = 120, Y1 = 120, Width = 50, Height = 75},
                    new Element() {X1 = 500, Y1 = 500, Width = 83, Height = 115},
                    new Element() {X1 = 333, Y1 = 444, Width = 100, Height = 100},
                    new Element() {X1 = 100, Y1 = 200, Width = 20, Height = 70}
                };

            var graphics = this.CreateGraphics();

            foreach (Element elem in lst)
            {
                Rectangle rect = new Rectangle(
                    elem.X1,
                    elem.Y1,
                    elem.Width,
                    elem.Height);

                graphics.DrawRectangle(new Pen(Color.Red), rect);
            }
        }
    }

    public class Element
    {
        public int X1 { get; set; }
        public int Y1 { get; set; }
        public int Width { get; set; }
        public int Height { get; set; }
    }
}