using Autodesk.Revit.DB; namespace ShrlAlgoToolkit.RevitAddins.General { public class LoadedFamilyDropHandler : IDropHandler { public void Execute(UIDocument document, object data) { ElementId familySymbolId = (ElementId)data; if (document.Document.GetElement(familySymbolId) is FamilySymbol symbol) { document.PromptForFamilyInstancePlacement(symbol); } } } }