Create a rectangle that can change it's name using loop in C#

I want to create several rectangles (with dynamic names) by changing the name of the rectangle

int[] num= { 1, 2, 3, 4 }; //I need infant number of rectangle but here only a symbol of four numbers.  
for (int i = 0; i < 3; i = i + 1)
{
    string  mystring= "regctangle"+num[i].ToString();
    string  rectanglename = myString; //this is the rectangle name change with the loop
    Rectangle rectanglename= new Rectangle(10, 10, 3, 3);
}

The results should be for first iteration rectangle

rectangle1

rectangle2

rectangle3

rectangle4