Despite having set OverwritePrompt=true, the SaveItemDialog does not warn if I select an existing featureclass. I'm sure I'm overlooking something silly.
var saveDialog = new SaveItemDialog()
{
Title = "Save as",
Filter = ItemFilters.GeodatabaseItems_All,
OverwritePrompt = true,
BrowseFilter = new BrowseProjectFilter(ItemFilters.FeatureClasses_All)
};
ArcGIS Pro is 3.5