string GetData(string id)
{
if (common == null)
{
common = CourseCSV.Initialize();
}
return(common.GetCourseData(id));
}
/// <summary>
/// Initialize CourseCSV instance and load course data from storage, if any.
/// </summary>
/// <returns></returns>
static public CourseCSV Initialize()
{
if (instance == null)
{
lock (obj)
{
instance = new CourseCSV();
Task t = instance.LoadCourseData();
t.Wait();
}
}
return(instance);
}
