private GeometricObject CreateInstance()
{
GeometricObject newInstance = CreateInstanceCore();
if (GetType() != newInstance.GetType())
{
string message = String.Format(
CultureInfo.InvariantCulture,
"Cannot clone geometric object. The derived class {0} does not implement CreateInstanceCore().",
GetType());
throw new InvalidOperationException(message);
}
return(newInstance);
}
