Namespaces or Project

This example is being used several times in this tutorials: application, overloading constructor

In other examples with Net Framework 2.0, console examples, we did use several namespaces . Here in this example, we are looking at a project level, where all the classes are created separately, but can be inherited or used as is you created multiples classes using a text editor like text pad or note pad.

Step 1: I used express C# 2005, and created a project array_1, later added a "windows.Form", and a class Multiply class. In this project Program.cs is the default class originated while creating project array_1

Note the namespace.

namespace remains same:

code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace array_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
    }
}

code for multiply.cs

Debuging window

Instanciating class multiply in multiply.cs

Now

follow with the program. Below also shows how to overload overloading constructors

provide inputs

The variable Z gets the value

The final output

Example below shows all the classes in namespace array_1 are put together

    using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
//windowsform.cs
namespace array_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
           //you need to remark when using framework SD 2.0 commandline
           // InitializeComponent();
        }
    }
     class multiply
        {
            public int z;
            private int x, y;
            public multiply() { Console.WriteLine(" constructor original"); }
            public multiply(int input1, int input2)
            {
                //x = input1;
               // y = input2;
               { Console.WriteLine(" constructor overloaded ");
            }
            public int method_1(int xx, int yy)
            {
                x = xx;
                y = yy;
                z = x * y;
                return z;
            }
    }
    class test
            {
                static void Main(string[] args)
                {
                    multiply mp = new multiply();
                    Console.Write("enter first numbers ");
                    int n1, n2;
                    n1 = Int32.Parse(Console.ReadLine());
                    Console.Write("enter second number ");
                    n2 = Int32.Parse(Console.ReadLine());
                   Console.WriteLine("Total is : " + mp.method_1(n1, n2));
                   //string str = 
                   MessageBox.Show(" Total is " + mp.z);
                   Console.ReadLine();
                }
        }
}

Constructor overloading:

    using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
//windowsform_2.cs
namespace array_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
           //you need to remark when using framework SD 2.0 commandline
           // InitializeComponent();
        }
    }
     class multiply
        {
            public int z;
            private int x, y;
            public multiply() { Console.WriteLine(" constructor original"); }
            public multiply(int input1, int input2)
            {
                //x = input1;
               // y = input2;
               { Console.WriteLine(" constructor overloaded " + input1 + "and " + input2 + " received");}
            }
            public int method_1(int xx, int yy)
            {
                x = xx;
                y = yy;
                z = x * y;
                return z;
            }
    }
    class test
            {
                static void Main(string[] args)
                {
                    multiply mp = new multiply();
                    Console.Write("enter first numbers ");
                    int n1, n2;
                    n1 = Int32.Parse(Console.ReadLine());
                    Console.Write("enter second number ");
                    n2 = Int32.Parse(Console.ReadLine());
                   Console.WriteLine("Total is : " + mp.method_1(n1, n2));
                   //string str = 
                   MessageBox.Show(" Total is " + mp.z);
                   multiply mp2 = new multiply(n1,n2);
                   Console.ReadLine();
                }
        }
}

Constructor overload was not in operation, because we by first formed an object with first constructor and then used a parameterized method; however when we created the another object ( " multiply mp2 = new multiply(n1,n2);" and added two arguments that corresponded to the overloaded-parameters of the constructor, we note the output from overloaded constructor