C# Anonymous Types

C# Anonymous types allow us to create an object that has read only properties. Anonymous object is an object that has no explicit type. C# compiler generates type name and is accessible only for the current block of code.

To create anonymous types, we must use new operator with an object initializer.

C# Anonymous Types Example

using System;
namespace CSharpFeatures
{
    class AnonymousTypesExample
    {
        public static void Main()
        {
            // Creating Anonymous Object
            var student = new { ID = 101, Name = "Peter", Email = "peter@example.com"};
            // Accessing object properties
            Console.WriteLine(student.ID);
            Console.WriteLine(student.Name);
            Console.WriteLine(student.Email);
        }
    }
}

Output:

101
Peter
[email protected]

We can also use it in query expression to select the records. In the following example, we are selecting students records by creating anonymous type.

C# Anonymous Types Example 2

using System;
using System.Collections.Generic;
using System.Linq;
namespace CSharpFeatures
{
    class Student
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
    }

    class AnonymousTypesExample
    {
        public static void Main()
        {
            List<Student> students = new List<Student> {
                new  Student{ ID=101, Name="Rahul", Email="rahul@example.com" },
                new  Student{ ID=102, Name="Peter", Email="peter@abc.com" },
                new  Student{ ID=103, Name="Irfan", Email="irfan@example.com" }
            };     
            var stquery =
            from student in students
            select new { student.ID, student.Name, student.Email }; // Creating Anonymous Types
            foreach (var st in stquery)
            {
                Console.WriteLine("ID = {0}, Name = {1}, Email = {2}", st.ID, st.Name, st.Email);
            }
        }
    }
}

Output:

ID = 101, Name = Rahul, Email = [email protected]
ID = 102, Name = Peter, Email = [email protected]
ID = 103, Name = Irfan, Email = [email protected]

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