You are developing an application by using C#. The application includes the following code
segment. (Line numbers are included for reference only.)
The DoWork() method must throw an InvalidCastException exception if the obj object is not
of type IDataContainer when accessing the Data property.
You need to meet the requirements.
Which code segment should you insert at line 07?
A.
var dataContainer = (IDataContainer) obj;
B.
var dataContainer = obj as IDataContamer;
C.
var dataContainer = obj is IDataContainer;
D.
dynamic dataContainer = obj;