using System;

​

public class School

{

    public string firstName;

    public string lastName;

    public int age;

    public int numberClass;

    public string Class;

}

​

public class Output

{

    public static void Main(string[] args)

    {

        School School = new School();

        School.firstName = "Vladimir";

        School.lastName = "Petkov";

        School.age = 17;

        School.numberClass = 11;

        School.Class = "A";

        Console.WriteLine("My name is " + School.firstName + " " + School.lastName + ", I am " + School.age + "years old and I'm in " + School.numberClass + School.Class + " class.");

    }

}