TakeWhile stops when the condition is false, Where continues and find all elements matching the condition

var intList = new int[] { 1, 2, 3, 4, 5, -1, -2 };
Console.WriteLine("Where");
foreach (var i in intList.Where(x => x <= 3))
    Console.WriteLine(i);
Console.WriteLine("TakeWhile");
foreach (var i in intList.TakeWhile(x => x <= 3))
    Console.WriteLine(i);

Gives

Where
1
2
3
-1
-2
TakeWhile
1
2
3