using System;
using System.Media;

class MainClass {
    public static void Main() {
        // Play a  beep with frequency as 200 and duration as 300
        Console.Beep(200, 300);

    }
}

    

   
 

using System;
using System.Media;

class MainClass {
    public static void Main() {
        Console.Beep();

    }
}

    

   



using System;


public class MainClass
{
    static void Main(string[] args) {

       // Change the console appearance and redisplay.
       Console.Title = "Colored Text";
       Console.ForegroundColor = ConsoleColor.Red;
       Console.BackgroundColor = ConsoleColor.Green;
   }
}

           
          

   
 

using System;

public class MainClass
{
    static void Main(string[] args) {
       // Change the console appearance and redisplay.
       Console.Title = "Resized Console";
       Console.ResetColor();
       Console.Clear();
       Console.SetWindowSize(100, 50);
       Console.BufferHeight = 500;
       Console.BufferWidth = 100;
       Console.CursorLeft = 20;
       Console.CursorSize = 50;
       Console.CursorTop = 20;
       Console.CursorVisible = false;
   }
}

    

   
 

using System;

public class MainClass
{
    static void Main(string[] args) {
       // Change the console appearance and redisplay.
       Console.Title = "Resized Console";
       Console.ResetColor();
       Console.Clear();
       Console.SetWindowSize(100, 50);
       Console.BufferHeight = 500;
       Console.BufferWidth = 100;
       Console.CursorLeft = 20;
       Console.CursorSize = 50;
       Console.CursorTop = 20;
       Console.CursorVisible = false;
   }
}

    

   


using System;

public class Addition
{
   public static void Main( string[] args )
   {
      int number1; 
      int number2; 
      int sum; 

      Console.Write( "Enter first integer: " ); 
      number1 = Convert.ToInt32( Console.ReadLine() );

      Console.Write( "Enter second integer: " );
      number2 = Convert.ToInt32( Console.ReadLine() );

      sum = number1 + number2;

      Console.WriteLine( "Sum is {0}", sum );
   } 
}


           
          

   




using System;

public class Welcome4
{
   public static void Main( string[] args )
   {
      Console.WriteLine( "{0}
{1}", "Welcome to", "C# Programming!" );
   } 
}