misunderstand this line ( Document doc = uiapp.ActiveUIDocument.Document; )

[eng.elfeky]

hello , iam new to programming but i have a problem in understanding this line

Document doc = uiapp.ActiveUIDocument.Document;

uiapp is an object of UIApplication class and  ActiveUIDocument is a property of uiapplication class so i can reach to it but the word document in (uiapp.ActiveUIDocument.Document) , what is the usage of it and there isnot any member or method called document for the uiapplication class 

so i want to know what is document word is it method , member of some class and the usage of it?

[jeremytammik · Accepted solution]

Welcome to Revit API programming!

Please refer to the Revit API getting started material and all will become clear for you:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#2

Best regards,

Jeremy