C# - Basic LINQ Example using 'numbers' and 'lowNums' to obtain the data source, create the query, and then execute the query.

basic_linq.cs

using System;
using System.Linq;

namespace BasicLinqExample.UI
{
    class Program
    {

        static void Main(string[] args)
        {
            // Basic elements of a query operation
            // Basic array of int data source
            int[] numbers = { 14, 37, 8, 6, 7, 2, 0, 5, 4, 1, 3, 9 };

            // Create the query 
            var lowNums =
                from n in numbers
                where n < 9
                select n;

            Console.WriteLine("Range of numbers < 9 from basic array:");
            // Execute the query 
            foreach (var x in lowNums)
            {
                Console.WriteLine(x);
            }
        }

    }
}
// Output = 8 6 7 2 0 5 4 1 3