Retrieve face from pick face of plates

[mr.engineer.aec]

 Hi All,

I'm using Revit 2020.

I want to retrieve face from pick face of plates but result is null. (face = null)
Can i do this at Revit 2020 API ? and how ?
 Thank in advanced !

Reference pickObject = UiDoc.Selection.PickObject(ObjectType.Face, "Please select Face");

Face face = Doc.GetElement(pickObject).GetGeometryObjectFromReference(pickObject) as Face;

 

[joshua.lumley]

This one is an easy solve. 

Element myElement = Doc.GetElement(pickObject.ElementId);

Face myFace = myElement.GetGeometryObjectFromReference(pickObject) as Face;

If they're handing out free donuts....TAKE ONE. 

[mr.engineer.aec]

 Hi @joshua.lumley 

Thank for your help. But still can't get face

[joshua.lumley]

Can you post the whole code.