private void ParseLessonsData()
{
XmlDocument xmlDoc = new XmlDocument();
#if UNITY_ANDROID
xmlDoc.LoadXml(Resources.Load <TextAsset>("course").text);
#else
xmlDoc.Load(Application.dataPath + "/data/course.xml");
#endif
XmlNodeList lessonsNodes = xmlDoc.DocumentElement.SelectNodes("/Course/Lesson");
Debug.Log(lessonsNodes.Count);
for (int i = 0; i < lessonsNodes.Count; i++)
{
var lesson = Lesson.FromXml(lessonsNodes.Item(i));
Game.lessons.Add(lesson);
}
Game.navigation.ShowLessonsMenu();
}