using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<Element> elements = BuildList();  

​

    // LINQ Query.  

    var subset = from theElement in elements  

                 where theElement.AtomicNumber < 100  

                 orderby theElement.AtomicNumber  

                 select theElement;  

​

    foreach (Element theElement in subset)  

    {  

        Console.WriteLine(theElement.Name + " " + theElement.AtomicNumber);  

    }  

    }

    private static List<Element> BuildList()  

{  

    return new List<Element>  

    {  

        { new Element() { Symbol="K", Name="IF1", AtomicNumber=19}},  

        { new Element() { Symbol="Ca", Name="IF2", AtomicNumber=20}},  

        { new Element() { Symbol="Sc", Name="IF3", AtomicNumber=25}},  

        { new Element() { Symbol="Ti", Name="IF4", AtomicNumber=22}}  

    };  

}  

    public class Element  

{  

    public string Symbol { get; set; }  

    public string Name { get; set; }  

    public int AtomicNumber { get; set; }  

} 

​

}