DevStudent

LINQ to Objects queries will return data of IEnumerable type.

Example of LINQ to Object with array type:

using System;
using System.Linq;

namespace LINQApp
{
    class Program
    {
        static void Main(string[] args)
        {//Fruit names are created in an array object
            string[] fruits = { "Guava", "Orange", "Apple", "Mango", "Banana" };
            //All items from fruits array are queried using LINQ query
            var items = from f in fruits
                        select f;

            foreach (string s in items)
            {
                Console.Write(s + Environment.NewLine);
            }
            Console.ReadKey();
        }
    }
}

Output:

Guava
Orange
Apple
Mango
Banana


Example of LINQ to Objects using Custom type:

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

namespace LINQApp
{
    //Type with two properties Name and Password
    class StudentLogin
    {
        public string StudentName { get; set; }
        public string StudentPassword { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            //Student Object of List with StudentLogin type
            List<StudentLogin> Student = new List<StudentLogin>();
            //Adding 3 items to Student object
            Student.Add(new StudentLogin { StudentName="Sudhir",StudentPassword="1234"});
            Student.Add(new StudentLogin { StudentName = "Ram", StudentPassword = "Ramu" });
            Student.Add(new StudentLogin { StudentName = "Raj", StudentPassword = "Raju" });
            //Querying all items in Student Object
            var stud = from st in Student
                       select st;
            //Printing Name and passwords retreived using LINQ query
            foreach (var s in stud)
            {
                Console.WriteLine(s.StudentName +" , "+s.StudentPassword);
            }
            Console.ReadKey();
        }
    }

}