Object Initializers
This change in C# 3.0 allows developers to get rid of the constructors they have to write in case of C# 2.0. Say for example in C# 2.0 if you have a class named CEmployee as follows:
class CEmployee
{
private int EmpID;
public int EID
{
get { return EmpID; }
set { EmpID = value; }
}
private string EmpName;
public string ENAME
{
get { return EmpName; }
set { EmpName = value; }
}
}
Now, if you want to initialize the objects at the time of declaration, as follows:
CEmployee obj1 = new CEmployee(101, "Rohit Sharma");
CEmployee obj2 = new CEmployee(102);
CEmployee obj3 = new CEmployee("Rahul");
To write the code shown in the lines above, the developer should write three parameterized constructors inside the CEmployee class as follows:
public CEmployee(int id, string name)
{
EmpID = id;
EmpName = name;
}
public CEmployee(int id)
{
EmpID = id;
}
public CEmployee(string name)
{
EmpName = name;
}
However in C# 3.0, if you have created properties inside your class as in above given CEmployee class, you do not have to write the constructors anymore. So C# 3.0 gives you this enhancement to write it easily as follows:
CEmployee obj1 = new CEmployee() { EID = 102, ENAME = "Rahul" };
CEmployee obj2 = new CEmployee() { EID = 103 };
CEmployee obj3 = new CEmployee() { ENAME = "Vijay Kumar" };
The above given lines of code are easier to read in respect with C# 2.0 code, but you have to write a bit more code.
