which one is best array or keyvalue pair.

Question

Hi Guys,

i am confusing which one i have to use in following scenario please suggest me which one is best.

scenario:

i want to store 300 values in this situation i am using array like below.

string[] array=new string[62000] ;

array[1]="aaa";

array[8]="bbb";

arrary[90]="ccc";

array[61000]="ddd";

like this i used here problem is actually i stored 300 values that values index's should be  1 to 62000  between .