Overloading constructors - CSharp Custom Type

CSharp examples for Custom Type:Constructor

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Introduction

A class or struct may overload constructors.

To avoid code duplication, one constructor may call another, using the this keyword: 

using System;

public class Product
{
  public decimal Price;
  public int Year;
  public Product (decimal price) { Price = price; }
  public Product (decimal price, int year) : this (price) { Year = year; }
}

When one constructor calls another, the called constructor executes first.

You can pass an expression into another constructor as follows: 


public Product (decimal price, DateTime year) : this (price, year.Year) { }

Implicit parameterless constructors

For classes, the C# compiler automatically generates a parameterless public constructor if and only if you do not define any constructors.

If you define at least one constructor, the parameterless constructor is no longer automatically generated.


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