public static void Main()
string firstName = "Bret";
Person person_1 = new Person();
person_1.firstName = "Chad";
Console.WriteLine("string value after function: " + firstName);
printGreeting(firstName);
Console.WriteLine("string value after function: " + firstName);
Console.WriteLine("Person value before function: " + person_1.firstName);
Console.WriteLine("Person value after function: " + person_1.firstName);
static void printGreeting(string name)
Console.WriteLine("Hello " + name);
static void printGreeting(Person person)
person.firstName = "Mildred";
Console.WriteLine("Hello " + person.firstName);