C#: Read a file into byte array

gistfile1.txt

// Read a file into byte array
internal static byte[] ReadFile (string fileName)
{
	FileStream f = new FileStream(fileName, FileMode.Open, FileAccess.Read);
	int size = (int)f.Length;
	var data = new byte[size];
	size = f.Read(data, 0, size);
	f.Close();
	return data;
}