using System;

public class Program

{

        //enum

        public enum sports

        {

            cricket=1,

            football=10,

            tennis=2

        };

​

    public static void Main()

    {

        int a=1;

        double b=2;

        float  c=100;

        string d="abhinay";

        short g=1;

        bool bo;

        DateTime dt=DateTime.Now;

        //nullable data types

        int? e=null;   

        float? f=null;

        //var and dynamic

        var h="100"; //var is implicitly typed varible it must be declared at instialization and later h=20 is not possible (possible for dynamic),defined at compile time

        dynamic i="100";

        i=20;

        //Array

        int[] array=new int[]{28,25,25,13,18};      

        //or int[] array =new int[5] den declare by array[0]=""

        string[] sarray=new string[5];

        object[] oarray=new Object[10];

    var anynomus=new

    {

        key1="value",

        key2="value2"

    };

       Console.WriteLine(Convert.ToInt32(sports.football));

       Console.WriteLine(anynomus.key2);

    }

    public static void Convertions()

    {

        int x=100;

        float f=x ;//implecit convertion

              x=Convert.ToInt32(f); //explicit

        short s=Convert.ToInt16(x);

       string str=Convert.ToString(x);

        //Convert.to method can be used for int,float,double,short,string,char,bool,datetime

        //difference between Tostring and convert.tostring (and convert.to $ .to) difference is .to method can not handle nulls

    }

}