add stages in article

docs/csharp/programming-guide/classes-and-structs/knowing-when-to-use-override-and-new-keywords.md

@@ -83,8 +83,10 @@ dc.Method2();
 bcdc.Method1();  
 bcdc.Method2();  
 ```  
-
- When you build the project, you see that the addition of the `Method2` method in `BaseClass` causes a warning. The warning says that the `Method2` method in `DerivedClass` hides the `Method2` method in `BaseClass`. You are advised to use the `new` keyword in the `Method2` definition if you intend to cause that result. Alternatively, you could rename one of the `Method2` methods to resolve the warning, but that is not always practical.  
+
+## The New Keyword
+
+When you build the project, you see that the addition of the `Method2` method in `BaseClass` causes a warning. The warning says that the `Method2` method in `DerivedClass` hides the `Method2` method in `BaseClass`. You are advised to use the `new` keyword in the `Method2` definition if you intend to cause that result. Alternatively, you could rename one of the `Method2` methods to resolve the warning, but that is not always practical.  
 
  Before adding `new`, run the program to see the output produced by the additional calling statements. The following results are displayed.  
 
@@ -111,7 +113,9 @@ public new void Method2()
 
  Run the program again to verify that the output has not changed. Also verify that the warning no longer appears. By using `new`, you are asserting that you are aware that the member that it modifies hides a member that is inherited from the base class. For more information about name hiding through inheritance, see [new Modifier](../../language-reference/keywords/new-modifier.md).  
 
- To contrast this behavior to the effects of using `override`, add the following method to `DerivedClass`. The `override` modifier can be added before or after `public`.  
+## Virtual and Override Keywords
+
+To contrast this behavior to the effects of using `override`, add the following method to `DerivedClass`. The `override` modifier can be added before or after `public`.  
 
 ```csharp  
 public override void Method1()  
@@ -212,8 +216,10 @@ namespace OverrideAndNew
     }  
 }  
 ```  
-
- The following example illustrates similar behavior in a different context. The example defines three classes: a base class named `Car` and two classes that are derived from it, `ConvertibleCar` and `Minivan`. The base class contains a `DescribeCar` method. The method displays a basic description of a car, and then calls `ShowDetails` to provide additional information. Each of the three classes defines a `ShowDetails` method. The `new` modifier is used to define `ShowDetails` in the `ConvertibleCar` class. The `override` modifier is used to define `ShowDetails` in the `Minivan` class.  
+
+## Override and New in Derived Classes
+
+The following example illustrates similar behavior in a different context. The example defines three classes: a base class named `Car` and two classes that are derived from it, `ConvertibleCar` and `Minivan`. The base class contains a `DescribeCar` method. The method displays a basic description of a car, and then calls `ShowDetails` to provide additional information. Each of the three classes defines a `ShowDetails` method. The `new` modifier is used to define `ShowDetails` in the `ConvertibleCar` class. The `override` modifier is used to define `ShowDetails` in the `Minivan` class.  
 
 ```csharp  
 // Define the base class, Car. The class defines two methods,