using System;
public class Person
{
	public String Name { get; set; } = "John";
}

public class Classroom
{
    public Person GetTeacher()
    {
        return null;
    }
}

public class Test
{
	public static void Main()
	{
		Classroom classroom = null;
		var teacherName = classroom?.GetTeacher()?.Name;
		System.Console.WriteLine(teacherName == null);
	}
}