✅ Deferred Execution or Forcing Immediate Execution

int[] nums = { 1, 2, 3, 4, 5};

var numQuery = from num in nums where (num % 2) != 0 select num;

foreach (int num in numQuery) { 
    Console.Write(num);
}

var evenNumQuery =
    from num in numbers
    where (num % 2) == 0
    select num;

int evenNumCount = evenNumQuery.Count();

List<int> numQuery2 =
    (from num in numbers
     where (num % 2) == 0
     select num).ToList();

// or like this:
// numQuery3 is still an int[]

var numQuery3 =
    (from num in numbers
     where (num % 2) == 0
     select num).ToArray();