Multiple constructors in a class definition

 
/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
// Constrct.cs - Demonstrates the use of multiple constructors
//               in a class definition.
//
//               Compile this program with the following command line:
//                   C:>csc Constrct.cs
//
namespace nsConstructor
{
    using System;
    struct POINT
    {
        public POINT (int cx, int cy)
        {
            this.cx = cx;
            this.cy = cy;
        }
        public int cx;
        public int cy;
    }
    public class Constrct
    {
        static public void Main ()
        {
            clsRect rc1 = new clsRect();
            clsRect rc2 = new clsRect (10, 12, 84, 96);
            POINT pt1 = new POINT (10, 12);
            POINT pt2 = new POINT (84, 96);
            clsRect rc3 = new clsRect (pt1, pt2);
        }
    }
    class clsRect
    {
// The following constructor replaces the default constructor
        public clsRect ()
        {
            Console.WriteLine ("Default constructor called");
            m_Left = m_Top = m_Right = m_Bottom  = 0;
        }
        public clsRect (int cx1, int cy1, int cx2, int cy2)
        {
            Console.WriteLine ("Constructor 1 called");
            m_Left = cx1;
            m_Top = cy1;
            m_Right = cx2;
            m_Bottom = cy2;
        }
        public clsRect (POINT pt1, POINT pt2)
        {
            Console.WriteLine ("Constructor 2 called");
            m_Left = pt1.cx;
            m_Top = pt1.cy;
            m_Right = pt2.cx;
            m_Bottom = pt2.cy;
        }
        public POINT UpperLeft
        {
            get {return(new POINT(m_Left, m_Top));}
            set {m_Left = value.cx; m_Top = value.cy;}
        }
        public POINT LowerRight
        {
            get {return(new POINT(m_Right, m_Bottom));}
            set {m_Right = value.cx; m_Bottom = value.cy;}
        }
        private int m_Left;
        private int m_Top;
        private int m_Right;
        private int m_Bottom;
    }
}

1.	simulate a bank account
2.	Using Initializers
3.	A simple inventory example
4.	Declaring and Defining Classes
5.	Declaring Class Instances
6.	Assign value to class
7.	Declare class and use it
8.	Illustrates how to declare classes, object references, and create objects
9.	Illustrates how to assign default values to fields using initializers
10.	illustrates how to use a 'has a' relationship
11.	Illustrates nested classes
12.	Demonstrate the use of a nested class to contain data
13.	Show name hiding in a derived class
14.	Illustrates hiding
15.	Variable in and out a class
16.	Create class
17.	A program that uses the Building class
18.	This program creates two Building objects
19.	Return an object
20.	Uses a class from Example16_3a.cs
21.	A Simple C# Class
22.	Persons Info class
23.	Message class
24.	Point class

Multiple constructors in a class definition : Class Definition « Class Interface « C# / C Sharp

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