C# Object and Collection Initializer

C# Object and Collection Initializer for beginners and professionals with examples on overloading, method overriding, inheritance, aggregation, base, polymorphism, sealed, abstract, interface, namespaces, exception handling, file io, collections, multithreading, reflection etc.

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C# Object Initializer

C# Object Initializer is a new way to assign values at the time of object creation. It does not require constructor call to assign fields values. Object Initializer is enclosed in braces and values are separated by commas.

In the following example, we are using object initializer to assign values.

C# Object Initializer Example

using System;
namespace CSharpFeatures
{
    class Student
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
    }
    class ObjectInitializer
    {
        public static void Main(string[] args)
        {
            // Using Object Initialilzer
            Student student = new Student { ID=101, Name="Rahul", Email="rahul@example.com" };
            // Displaying Initialized Values
            Console.WriteLine(student.ID);
            Console.WriteLine(student.Name);
            Console.WriteLine(student.Email);
        }
    }
}

Output:

101
Rahul
[email protected]

C# Collection Initializer

Collection Initializer allows us to initialize a collection type that implements IEnumerable interface. The following example implements collection initializer.

C# Collection Initializer Example

using System;
using System.Collections.Generic;
namespace CSharpFeatures
{
    class Student
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
    }
    class ObjectInitializer
    {
        public static void Main(string[] args)
        {
            List students = new List {
                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" }
            };
            foreach (Student student in students)
            {
                Console.Write(student.ID+" ");
                Console.Write(student.Name+" ");
                Console.Write(student.Email+" ");
                Console.WriteLine();
            }
        }
    }
}

Output:

101 Rahul [email protected]
102 Peter [email protected]
103 Irfan [email protected]

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