who understands the topic explain to me whether it is possible to write plugins in Python
or only C# can do it
C only I believe as you need a dll For Revit to load it to the ribbon.
C# only ?
Ok…
Yes, my first dll is ready
and next
first question - how get builtInCategory (OST_…) from the list of elements
probably (im not shure) all cats we can get that:
foreach (var j in System.Enum.GetValues(typeof(BuiltInCategory)))
and later for current elements get OST
I think someone wrote in C# and im waiting for prompts 
Hate to be a stickler but… This is a Revit API question not a Dynamo question. Consider checking the API documentation, specifically the my first plugin, and the API forums. Or alternatively, just stick to the flexibility and authoring speed provided by Dynamo.
@jacob.small yes you right
but im dont now special forum for my question or another forums with so good activity
Revit API Forum - Autodesk Community should work for the forum.
Autodesk | 3D Design, Engineering & Construction Software Should work for the tutorial.
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@jacob.small
thanks
second links its already used for me )
just yesterday I decided to find out what is C# 
and special thanks for first link ! i thinks its will helpful for me
I have a beginner’s guide to Revit API in C# Youtube channel. It’s a good place to get your feet wet.
Best DB
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