public static void updateCourseInCourseCollection(Course oldCourse, Course newCourse)
{
var courseList = Courses.ToList();
Courses.Clear();
var database = new SqliteDataService();
database.Initialize();
database.UpdateCourse(newCourse);
int indexFound = courseList.IndexOf(oldCourse);
courseList.RemoveAt(indexFound);
courseList.Insert(indexFound, newCourse);
courseList.ForEach(course => Courses.Add(course));
database.Close();
}