Task 1:

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

Task 2:

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello Abdulla");

    }

}

​

Task 3:

using System;

public class Program

{

    public static void Main()

    {

        String name = "Abdulla";

        Console.WriteLine("Hello "+name);

    }

}

​

Task 4:

using System;

public class Program

{

    public static void Main()

    {

        String name = "Abdulla";

        int age = 16;

        String cpr = "05302906";

        int mobileNumber = 39150406;

        Char gender = 'F';

        DateTime birthDate = new DateTime (2005, 03, 9, 09, 00,00);

        double weight = 90.7;

        bool isMaried = false;

        double Salary = 0;

        Console.WriteLine(Salary);

    }

}

​

Task 5:

using System;

public class Program

{

    public static void Main()

    {

        String name = "Abdulla";

        int age = 16;

        String cpr = "050302906";

        int mobileNumber = 39150406;

        Char gender = 'M';

        DateTime birthDate = new DateTime (2005, 03, 19, 09, 00,00);

        double weight = 70.50;

        bool isMaried = false;

        double Salary = 0;

        Console.WriteLine( "Name: " + name + " Age: " + age + " CPR: " + cpr + " Mobile Number: " + mobileNumber + " Gender: " + gender + " Birth Date: " + birthDate + " Weight: " + weight + " Married? : " + isMaried + " Salary: " + Salary );

    }

}

​

Task 6:

using System;

public class Program

{

    public static void Main()

    {

        int number1, number2, total;

        number1 = 9;

        number2 = 7;

        total = number1 + number2;

        Console.WriteLine("The total is: " + total);

    }

}

​

Bonus:

using System;

public class Exercise5

{

    public static void Main()

    {

        double r,per_cir;

        double PI = 3.14;

        Console.WriteLine("Input the radius of the circle : ");

        r = Convert.ToDouble(Console.ReadLine());

        per_cir = 2 * PI * r;

        Console.WriteLine("Perimeter of Circle : {0}", per_cir);

        Console.Read();

    }

}