How to draw lines from vertices (x,y) (which i stored the value in arraylist) in c#

Hi,

i need help on draw lines from vertices (vertex points that i stored the values in arraylist.
i already done the vertex points of shape and now my problem is to draw line between those vertices

i need to draw geometry connected lines example:

-Diamond- i already have the vertex values (which 4 points in x, y position)

-i get the values from the arraylist (stored)

- i need to draw line by connected all the 4 points

- and save the image.

really appreciate if someone could help me

Thanks