difference between two types of querying in-memory objects of c#

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collections

Hi and Hello everybody,

I am learning c# collections and found some LINQ retrieving queries , but couldn't understand where we must use iEnumeralbe and where we may not need it,

if anybody gives me the difference of the following two types, would be greatful for me to move further... thanks in advance guys..



int[] integers = { 1, 9, 5, 3, 7, 2, 11, 23, 50, 41, 6, 8 };
IEnmerable<int> takeWhileNumber = integers.TakeWhile(num =>
num.CompareTo(50) != 0);




int[] takeWhileNumber ;
int[] integers = { 1, 9, 5, 3, 7, 2, 11, 23, 50, 41, 6, 8 };
takeWhileNumber = integers.TakeWhile(num =>
num.CompareTo(50) != 0);