Chaining Query Operators « Introduction « LINQ

To illustrate, the following query extracts all strings containing the letter "a", sorts them by length, and then converts the results to uppercase:

 
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
class Program
{
    static void Main()
    {
        string[] names = { "C", "Java", "C#", "Javascript" };

        IEnumerable<string> query = names
                                    .Where(n => n.Contains("a"))
                                    .OrderBy(n => n.Length)
                                    .Select(n => n.ToUpper());

        foreach (string name in query)
            Console.WriteLine(name);
    }
}


JAVA
JAVASCRIPT

 
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
class Program
{
    static void Main()
    {
        string[] names = { "C", "Java", "C#", "Javascript" };


        IEnumerable<string> filtered = names.Where(n => n.Contains("a"));
        IEnumerable<string> sorted = filtered.OrderBy(n => n.Length);
        IEnumerable<string> finalQuery = sorted.Select(n => n.ToUpper());


        foreach (string name in filtered)
            Console.Write(name + "|");
        Console.WriteLine();

        Console.WriteLine();
        foreach (string name in sorted)
            Console.Write(name + "|"); 

        Console.WriteLine();

        Console.WriteLine();
        foreach (string name in finalQuery)
            Console.Write(name + "|");  

        Console.WriteLine();  
    }
}


Java|Javascript|

Java|Javascript|

JAVA|JAVASCRIPT|