asp.net - How to add array of Objects of a class to List of type <x> where x is the same class in C# -

am have class, x. have created array of objects, , list of type of same class.

eg:

public class test : iextensibledataobject {     int a;     string b;     [datamember(name = "a", isrequired = false, order = 1)]     public int     {         { return a; }         set { value = a; }     }     [datamember(name = "b", isrequired = false, order = 2)]     public string b     {         { return b; }         set { value = b; }     } } 

the object array created like

test[] test1 = new test[2]; list<test> test2 = new list<test>(); test1[0].a = 1; test1[0].b = "t"; test1[1].a = 2; test1[1].b = "y"; test2.add(test1); 

this line:

test2.add(test1); 

is not working. error

"object reference not set instance of object".

test1[0] null.
need create instance before can set properties.

also, can add() test[] list<test[]> (a list of arrays).

if want add of objects in array, call addrange().