=== Классы и объекты ===

Person tom = new Person();
string personName = tom.name;
int personAge = tom.age;
Console.WriteLine($"name: {personName} age: {personAge}");

tom.name = "Tom";
tom.age = 37;
tom.Print();

class Person
{
    public string name = "Undefined";
    public int age;

    public void Print()
    {
        Console.WriteLine($"Имя: {name} Возраст: {age}");
    }
}

=== Конструкторы, инициализаторы и деконструкторы ===

Person tom = new Person();
Person bob = new Person("Bob");
Person sam = new Person("Sam", 25);
tom.Print();
bob.Print();
sam.Print();

class Person
{
    public string name;
    public int age;
    public Person()
    {
        name = "Unknown";
        age = 18;
    }
    public Person(string n) { name = n; age = 18; }
    public Person(string n, int a) { name = n;  age = a; }

    public void Print()
    {
        Console.WriteLine($"name: {name} age: {age}");
    }

}


Person sam = new Person("Sam", 25);
sam.Print();

class Person
{
    public string name;
    public int age;
    public Person()
    {
        name = "Unknown";
        age = 18;
    }
    public Person(string name) { this.name = name; age = 18; }
    public Person(string name, int age)
    {
        this.name = name;
        this.age = age;
    }
    public void Print()
    {
        Console.WriteLine($"name: {name} age: {age}");
    }
}

"Цепочка вызова конструкторов"
Person sam = new Person("Sam", 25);
sam.Print();

class Person
{
    public string name;
    public int age;
    public Person() : this("Unknown") { }
    public Person(string name) : this(name, 18) { }
    public Person(string name, int age)
    {
        this.name = name;
        this.age = age;
    }
    public void Print() => Console.WriteLine($"Name: {name} Age: {age}");
}