how do I return data from using method c# code example

Example 1: if a method doesnt rutern a value, what shouyld i reeturn c#

return void;

Example 2: c# function return

// To create a function with a return value, note the variable
// type in front of the function name and add a return of the
// same type at the end.
static string lastFirst(string firstName, string lastName)
{
	string separator = ", ";
	string result = lastName + separator + firstName;
	return result;
}