The LINQ Where Operator

The Where operator filters a sequence based on a predicate.

This sample uses where to find all elements of an array less than 5.

public void Linq1()
{
    int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };

    var lowNums =
        from n in numbers
        where n < 5
        select n;

   Console.WriteLine("Numbers < 5:");
    foreach (var x in lowNums)
    {
       Console.WriteLine(x);
    }
}