C# Practice

Student testStudent0 = new Student() { FirstName = "TestName0", Email = "TestEmail0" };
Student testStudent1 = new Student("TestName1", "TestLastName1");
Student testStudent2 = new Student("TestName2", "TestLastName2", "test2@gmail.com");
Student testStudent3 = new Student("TestName3", "TestLastName3", "test3@gmail.com", "Test3Address");
Student testStudent4 = new Student("TestName4", "TestLastName4", "test4@gmail.com", "Test4Address", 7771234578);

Student[] students = new Student[]
{
	testStudent0,
	testStudent1,
	testStudent2,
	testStudent3,
	testStudent4,
	new Student("FN", "LN")
};

Console.WriteLine("Меню");
Console.WriteLine("1. Показать всех студентов");
Console.WriteLine("2. Найти студента по имени");
Console.WriteLine("3. Добавить нового студента");

switch (Convert.ToInt32(Console.ReadLine()))
{
	case 1:
		foreach (Student student in students)
		{
			Console.WriteLine("=====================");
			Console.WriteLine(student.FirstName);
			Console.WriteLine(student.LastName);
			Console.WriteLine(student.Email);
			Console.WriteLine(student.Address);
			Console.WriteLine(student.PhoneNumber);
			Console.WriteLine("=====================");
		}
		break;
	default:
		break;
}



class Student
{
	public string FirstName = "Неизвестное имя";
	public string LastName = "Неизвестная фамилия";
	public string Email = "Неизвестная эл. почта";
	public string Address = "Неизвестный адресс";
	public long PhoneNumber;

	public Student()
	{

	}

	public Student(string firstName, string lastName)
	{
		FirstName = firstName;
		LastName = lastName;
	}

	public Student(string firstName, string lastName, string email)
	{
		FirstName = firstName;
		LastName = lastName;
		Email = email;
	}

	public Student(string firstName, string lastName, string email, string address)
	{
		FirstName = firstName;
		LastName = lastName;
		Email = email;
		Address = address;
	}

	public Student(string firstName, string lastName, string email, string address, long phoneNumber)
	{
		FirstName = firstName;
		LastName = lastName;
		Email = email;
		Address = address;
		PhoneNumber = phoneNumber;
	}
}