C# Collection Initializers enable you to add items in the collection at the time of instantiation of the collection. Collection can be a List or Dictionary or any other available C# collection.
Till C# 2.0, for creating a collection of Employees we normally do
List<Employee> employees = new List<Employee>();
employee.Add(new Employee("EMP001","Sam","Bangalore,India",20000));
employee.Add(new Emploee("EMP00","Peter","Bombay,India",30000));
employee.Add(new Emploee("EMP003","Tom","Delhi,India",40000));
Assuming that there is an overloaded constructor for the Employee class.
Here above, each Employee object is added one by one after creating the collection instance.
In C# 3.0 by the use of collection Initializers, it is possible to declare and initialize the collection in line directly as below.
List<Employee> employees = new List<Employee>()
{
new Employee("EMP001","Sam","Bangalore,India",20000),
new Emploee("EMP002","Peter","Bombay,India",30000)
new Emploee("EMP003","Tom","Delhi,India",40000)
};Similarly, any other collection can be declared. See a dictionary example below
Dictionary<string,Employee> employeeDictionary <br>
= new Dictionary<string,Employee>()
{
{"Emp1",new Employee("EMP001","Sam","Bangalore,India",20000)},
{"Emp2",new Employee("EMP002","Tom","Delhi,India",40000)}<br>
};
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