// Change elements
public void SwapControl(int line, int controlNum, Control newControl)
{
LayoutElement lElement = elementList?[line].GetElement(controlNum);
if (lElement == null)
{
throw new ArgumentException("The element doesn't exist");
}
GridElement gElem = lElement as GridElement;
if (gElem != null)
{
gElem.control = newControl;
}
else if (lElement is BlankElement)
{
throw new NotSupportedException("Feature is not yet working");
}
else
{
throw new InvalidOperationException($"Unknown element type in List: {lElement.GetType().Name}");
}
}
