access returned object in another class

I'm trying to read id3 tags from a directory and I found some code online i've been trying to understand.

I understand most of it except the method GetTag(), it creates a new instance and returns an object but i can't access it from my main program.

public class Mp3Reader { private string _fileName; private Stream _stream; private byte[] data; private const int SIZE = 128; public Mp3Reader(string fileName) { _fileName = fileName; _stream = new FileStream(_fileName, FileMode.Open, FileAccess.Read); } public Mp3Tag GetTag() { Mp3Tag tag = new Mp3Tag(); data = new byte[SIZE]; _stream.Seek(-128, SeekOrigin.End); _stream.Read(data, 0, SIZE); //_stream.Close(); byte b1 = data[0]; byte b2 = data[1]; byte b3 = data[2]; if ((Convert.ToChar(b1) != 'T') || (Convert.ToChar(b2) != 'A') || (Convert.ToChar(b3) != 'G')) { throw new Exception("This File is NOT a MP3 file with ID3 v1"); } for (int i = 3; i < 33; i++) { if (data[i] != 0) tag.Title += Convert.ToChar(data[i]); } for (int i = 33; i < 63; i++) { if (data[i] != 0) tag.Artist += Convert.ToChar(data[i]); } for (int i = 63; i < 93; i++) { if (data[i] != 0) tag.Album += Convert.ToChar(data[i]); } for (int i = 93; i < 97; i++) { if (data[i] != 0) tag.Year += Convert.ToChar(data[i]); } for (int i = 97; i < 127; i++) { if (data[i] != 0) tag.Comment += Convert.ToChar(data[i]); } tag.Genere = data[127].ToString(); return tag; } } 

main

static void Main(string[] args) { string folder = @"D:\\508-507-2209 (2017)"; var files = Directory.GetFiles(folder); foreach(var val in files) { Mp3Reader tag2 = new Mp3Reader(val); tag2.GetTag(); Console.WriteLine(""); } } 

mp3tag.cs

public class Mp3Tag { public string Title { get; set; } public string Artist { get; set; } public string Album { get; set; } public string Year { get; set; } public string Genere { get; set; } public string Comment { get; set; } } 

If I manually Console.WriteLine(tag.xxx) right above my return it'll output to the terminal fine, what I don't understand is what to do with the "tag" variable that it created. why can't i access tag.Title in my main program?

tag.Genere = data[127].ToString(); Console.WriteLine("Title: " + tag.Title); Console.WriteLine("Artist: " + tag.Artist); Console.WriteLine("Album: " + tag.Album); ; Console.WriteLine("Year: " + tag.Year); Console.WriteLine("Comments: " + tag.Comment); Console.WriteLine("Genere" + tag.Genere); return tag;