public void Insert(TimeSheet timeSheet)
{
if (dataCollection.Any(ts => ts.ID == timeSheet.ID))
{
throw new InvalidOperationException();
}
dataCollection.Add(timeSheet);
}
public void Update(TimeSheet timeSheet)
{
if (dataCollection.Any(ts => ts.ID == timeSheet.ID))
{
dataCollection.Remove(timeSheet);
dataCollection.Add(timeSheet);
return;
}
throw new InvalidOperationException();
}
public void Delete(TimeSheet timeSheet)
{
dataCollection.Remove(timeSheet);
}