Don’t Worry, Be Happy!

1954 – Fortran

1957 – Cobol

1958 - Algol

1958 – Lisp

around 1958 – Comit

1960 – APL

1960 - Algol 60

1962 – Snobol

1964 – PL/I

1964 – Simula

1964 – Basic

1964 – TRAC

around 1965 – CPL

around 1966 – Algol W

1967 – BCPL

1968 – Logo

1969 – B

1969 – Smalltalk

1970 – Forth

1970 – Prolog

1970 – Pascal

1970 – Algol 68

1970 – Icon

1971 – C

1971 – sh

1972 – PL/M

1974 – Clu

1975 – Modula

1975 – Scheme

1978 – awk

1978 – csh

around 1978 – InterPress

1978 – JaM

1979 – Rex

1979 – Ada

1980 – C with Classes

1981 – ABC

1982 – ksh

1983 – Turbo Pascal

1983 – Objective-C

1983 – C++

1983 – ML

1984 – PostScript

1984 – Neon

1984 – Concurrent C

1984 – Common Lisp

1985 – Object Pascal

1986 – Eiffel

1987 – Oberon

1987 – Perl

1987 – Caml

1988 – Tcl

1988 – Modula 3

1989 – Yerk

1989 – Clos

1989 – bash

1991 – Python

1991 – NetRexx

1991 – Java

1991 – Sather

around 1991 – Visual Basic

around 1993 – Mops

1993 – Ruby

1995 – Delphi

1995 – PHP

1996 – J

1996 – Objective Caml

2000 – C#

2000 – Internet C++

Form.cs

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void label1_Click(object sender, EventArgs e)
        {


        }

        private void button1_Click(object sender, EventArgs e)
        {
           
            if (comboBox1.SelectedItem.ToString() == "male")
            {
                Male x = new Male();
                x.Name = textBox1.Text;
                x._gender = Gender.Male;
                MessageBox.Show(x.Talk());
            }

            else
            {
                Female x = new Female();
                x.Name = textBox1.Text;
                x._gender = Gender.Female;
                MessageBox.Show(x.Talk());
            }
           
        }
    }

}

Male.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace WindowsApplication1
{
    class Male : human
    {
        public override string Talk()
        {
            return base.Talk() + "I am a boy";

        }
    }
}

Female.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace WindowsApplication1
{
    class Female : human
    {
        public override string Talk()
        {
            return base.Talk() + "I am a girl";

        }
    }
}

Human.cs

using System;
using System.Collections.Generic;
using System.Text;
namespace WindowsApplication1
{
    public enum Gender
    {
        Male,
        Female
    }
    public class human
    {
        public human()
        {
            humanCounter++;
        }

        private string name;
        private Gender gender;
        public virtual string Talk()
        {

            return "my name is " + name + " and i am a " + gender + ".nCurrent Number of Instance of human" + humanCounter;

        }

        private static int humanCounter = 0;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        public Gender _gender
        {
            get
            {
                return gender;
            }

            set
            {
                gender = value;
            }


        }

    }

}

Form1.cs

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void label1_Click(object sender, EventArgs e)
        {

          
        }

        private void button1_Click(object sender, EventArgs e)
        {
            human x = new human();
            x.Name = textBox1.Text;
            if (comboBox1.SelectedItem.ToString() == "Male")
            {
                x._gender = Gender.Male;
            }
            else
            {
                x._gender = Gender.Female;
            }
            MessageBox.Show(x.Talk());
        }
    }

    }

Human.cs

using System;
using System.Collections.Generic;
using System.Text;
namespace WindowsApplication1
{
    public enum Gender
    {
        Male,
        Female
    }
    public class human
    {
        public human()
        {
            humanCounter++;
        }

        private string name;
        private Gender gender;
        public string Talk()
        {

            return "my name is " + name +" and i am a " + gender +".nCurrent Number of Instance of human" + humanCounter;

        }

        private static int humanCounter = 0;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        public Gender _gender
        {
            get
            {
                return gender;
            }

            set
            {
                gender = value;
            }


        }

    }

}