static void Main(string[] args)
{
// var trialPerson = new Person {Name="trial", DateOfBirth= new DateTime(1982,05,02)};
// trialPerson.WriteToConsole();
var harry = new Person {
Name = "Harry"
};
var mary = new Person {
Name = "Mary"
};
var jill = new Person {
Name = "Jill"
};
//call instance medhod
var baby1 = mary.ProcreateWtih(harry);
//call static method
var baby2 = Person.Procreate(harry, jill);
//call an operator
var baby3 = harry * mary;
WriteLine($"{harry.Name} has {harry.Children.Count} children's");
WriteLine($"{mary.Name} has {mary.Children.Count} children's");
WriteLine($"{jill.Name} has {jill.Children.Count} children's");
WriteLine($"Harry's first child name is {harry.Children[0].Name}");
// call local function
WriteLine($"5! is {Person.Factorial(5)}");