c# - Create a empty array of points -

i'm trying create empty array of points, i'm using following

    point[] listapontos = new[]; //should create empty point array later use doesn't.                point ponto = new point(); //a no coordinates point later use                (int = 1; <= 100; i++) //cycle create 100 points, x , y coordinates                {                    ponto.x = * 2 + 20;                    ponto.y = 20;                    listapontos[i] = ponto;                } 

i'm having trouble, because can't create empty array of points. create empty array of strings using list, since need 2 elements, list isn't useful here.

any hints? (hints problem welcome)

// should create empty point array later use doesn't.

no, you've specified isn't valid syntax. if want empty array, use of:

point[] listapontos = new point[0]; point[] listapontos = new point[] {}; point[] listapontos = {}; 

however, you've got array 0 elements, statement:

listapontos[i] = ponto; 

... throw exception. sounds should either use list<point>, or create array of size 101:

point[] listapontos = new point[101]; 

(or create array of size 100, , change indexes use - you're not assigning index 0.)

it's important understand in .net, array object doesn't change size after creation. that's why it's convenient use list<t> instead, wraps array, "resizing" (by creating new array , copying values) when needs to.