Revit二次开发之删除元素

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.Attributes;
using Autodesk.Revit.UI.Selection;
namespace ClassLibrary1
{
    [Autodesk.Revit.Attributes.Transaction(TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(RegenerationOption.Manual)]
    public class GetElement : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Document doc = uidoc.Document;
            Selection selection = uidoc.Selection;
            #region 删除 
            ICollection ids = selection.GetElementIds();
            using (Transaction ts = new Transaction(doc))
            {
                ts.Start("删除元素");
                foreach(var item  in ids)
                {
                    ICollection ids_delete = doc.Delete(item);
                }
                ts.Commit();

            }

            #endregion
            return Result.Succeeded;
        }
    }
}