Constructor

What is Constructor?

Constructor is method in class is called when instance of class is Created

Why We need Constructor?

• Initialize some of field in Class
• To Put object in Early State
• Provide Multiple Way to initialize new Object

Example

public class Person
    {
        public static int PeopleCount = 0;
        public string Name;
        public int Id;

        //This is Constor
        //By Default every Person Object is initiated with Name:"Vivek"
        public Person()
        {
            this.Name = "Vivek";
            this.Id = PeopleCount + 1;
        }

        //Constructor with Input Parameter
        //this() command will Call Constuctor with empty parameters first
        public Person(string name) : this()
        {
            this.Name = name;//this referes to Active instance
        }

        public Person(int id, string name) : this(name)
        {
            this.Id = id;
            this.Name = name;//this referes to Active instance
        }

        public void Introduce()
        {
            Console.WriteLine($"Hello My Name is {this.Id} {this.Name}");
        }
    }

Constructor Overloading

• Overloading means methods with Same name but with different signatures
• Overloading works with any method or function
• When we use Overloading with Constructor it is called Constructor Overloading