Collection Initializers in C# 3.0

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 
                          = new Dictionary<string,Employee>()
{
     {"Emp1",new Employee("EMP001","Sam","Bangalore,India",20000)},
     {"Emp2",new Employee("EMP002","Tom","Delhi,India",40000)}
};