point in c#

Question

I have this code ,I want to send pt1 and pt2 when click on button to method I have problem in prototype of pt1 and pt2 what is the change I should to do ?

 

public double angleOf(Point p1, Point p2)

{

double deltaY = (p2.Y - p1.Y);

double deltaX = (p2.X - p1.X);

double result = Math.Atan2(deltaY, deltaX);

result *= (180 / Math.PI);

result += 22.5;

return (result < 0) ? (360d + result) : result;

}

private void button1_Click(object sender, EventArgs e)

{

double angle;

Point pt1 = 4428900.38515348;

Point pt2 = 4428900.38515346;

angle = angleOf(pt1, pt2);

textBox1.Text += angle;