Update Readme.md

Author: ycarowr

Assets/GameProgramming/TypeObject/Readme.md

@@ -1,8 +1,20 @@
 
 # Type Object
 
+## Definition
+
+"Define a type object class and a typed object class. Each type object instance represents a different logical type. Each typed object stores a reference to the type object that describes its type."
+
+## When use it
+
+1. You don’t know what types you will need up front
+2. You want to be able to modify or add new types without having to recompile or change code.
+
+### Notes
+- You move the Type from Code to Data. The flexibility is good, but you lose some things by hoisting your types into data.
+- We need to make sure the Types are loaded in memory because they are now objects, and not part of the language done in compilation time.
+- It is much more complex to add new behaviors to specific Types because we don't have code (this point not valid for Scriptable Objects). 
 
 References:
-1. Book [Game Programmings Patterns](https://gameprogrammingpatterns.com/subclass-sandbox.html)
-2. Github [Qian Mo](https://github.com/QianMo/Unity-Design-Pattern/tree/master/Assets/Game%20Programming%20Patterns/SubclassSandbox%20Pattern)
-3. Article [Habrador](https://www.habrador.com/tutorials/programming-patterns/11-subclass-sandbox-pattern/)
+1. Book [Game Programmings Patterns](https://gameprogrammingpatterns.com/type-object.html)
+2. Github [Qian Mo](https://github.com/QianMo/Unity-Design-Pattern/tree/master/Assets/Game%20Programming%20Patterns/Type%20Object%20Pattern)