About Language Integrated Query

Why we are using LINQ?

LINQ means Language Integrated Query.It is data access programming in .Net.LINQ is used to retriving the data from data bases like LINQ to XML, LINQ to SqlServer.

Namespace is : using System.Linq;

This LINQ has different types of components

Linq to Objects : It works with in memory data, that impliments IEnumerable interface

Namespace is : using System.Collections.Generic;

Example for Generate odd numbers:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{

IEnumerable<int> oddNums
= ((ParallelQuery<int>)ParallelEnumerable.Range(20, 2000))
.Where(x => x % 2 != 0)
.Select(i => i);

foreach (int n in oddNums) { Console.WriteLine(n); }
Console.ReadLine();
}

}
}

Linq example program