An object and collection initializer is a fascinating and extremely useful feature of the C# programming language. This feature provides an alternative method for initialising a class or collection object. The main benefits of using these are that they make your code more readable, they provide an easy way to add elements to collections, and they are commonly used in multi-threading.
Object Initializer
Object Initializer is a new way to assign values to objects when they are created. It is not necessary to use a constructor call to assign values to fields. The object initializer is surrounded by braces, and the values are separated by commas.
Example
using System;
namespace CSharpFeatures
{
class Employee
{
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
Employee employee = new Employee { ID=25, Name="Niki", Email="niki@gmail.com" };
// Displaying Initialized Values
Console.WriteLine(employee.ID);
Console.WriteLine(employee.Name);
Console.WriteLine(employee.Email);
}
}
}
OUTPUT
25 Niki niki@gmail.com
Collection Initializer
Collection Initializer allows us to set up a collection type that conforms to the IEnumerable interface. The collection initializer is demonstrated in the following example.
Example
using System;
using System.Collections.Generic;
namespace CSharpFeatures
{
class Employee
{
public int ID { get; set; }
public string Name { get; set; }
public string Email { get; set; }
}
class ObjectInitializer
{
public static void Main(string[] args)
{
List<Employee> employee= new List<Employee> {
new Employee { ID=25, Name="Niki", Email="niki@gmal.com.com" },
new Employee { ID=26, Name="Ruju", Email="ruju@gmail.com" },
new Employee { ID=27, Name="Damini", Email="damini@gmail.com" }
};
foreach (Employee emp in employee)
{
Console.Write(emp.ID+" ");
Console.Write(emp.Name+" ");
Console.Write(emp.Email+" ");
Console.WriteLine();
}
}
}
}
OUTPUT
25 Niki niki@gmail.com 26 Ruju ruju@gmail.com 27 Damini damini@gmail.com
