Sample Code

Lab1.cs

using System;

namespace ConsoleApplication2
{
    public class Program
    {
        public static void Main()
        {
           int mark = 66;

            if (mark >= 60)
                Console.WriteLine("Pass");
            else
                Console.WriteLine("Fail");

            Console.WriteLine("Good bye");
            Console.ReadLine();
        }
    }
}

Lab2.cs

// using System;

namespace ConsoleApplication2
{
    public class Program
    {
        public static void Main()
        {
            double Temp = 19D;
            
            If (Temp <> 20);
                Console.WriteLine("The weather is moderate");
                Console.WriteLine("Nice weather, let us go outside");
            else
                Console.WriteLine("Weather ?!");
         }
     }

StringInterpolation1.cs

var person = new { Name = "Jeff", Age = 20 };
var s = $"{person.Name} is {person.Age} year(s) old";
Console.WriteLine(s);

StringInterpolation2.cs

var person = new { Name = "Jeff", Age = 20 };
var s = $"{person.Name:20} is {person.Age:D3} year(s) old";
Console.WriteLine(s);

StringInterpolation3.cs

var person = new { Name = "Jeff", Age = 20 };
var s = $"{person.Name} is {person.Age} year {(person.Age == 1 ? "" : "s")} old";
Console.WriteLine(s);