Return: Quiz III in C#

Quiz: What would this code produce if we were to copy-paste it in a code editor and run it?

public string GetGreeting(string name) {
	Console.WriteLine("Hey, " + name);
}

public void MainFunction() {
	string greeting = GetGreeting("Andy");
	Console.WriteLine(greeting);
}

Important Note:

Do not use an actual code editor to get the answer! It would defy the whole purpose of the quiz!