Please tell me why don't work this programfor splitting body.

Why don't get the two bodies from this part.

using SolidWorks.Interop.sldworks;

using SolidWorks.Interop.swconst;

using System;

using System.Diagnostics;

namespace CreateCutExtrudeCSharp.csproj

{

    public partial class SolidWorksMacro

    {

        public void Main()

        {

            ModelDoc2 swModel = default(ModelDoc2);

            ModelDocExtension swModelDocExt = default(ModelDocExtension);

            FeatureManager swFeatureManager = default(FeatureManager);

            Feature swFeature = default(Feature);

            SelectionMgr swSelMgr = default(SelectionMgr);

            bool boolstatus = false;

            swModel = (ModelDoc2)swApp.ActiveDoc;

            swModelDocExt = (ModelDocExtension)swModel.Extension;

            swFeatureManager = (FeatureManager)swModel.FeatureManager;

            swSelMgr = (SelectionMgr)swModel.SelectionManager;

            object[] vResultingBodies;

            object vBodiesToMark;

            object vOrigins;

            object vBodyName;

            object[] BodiesToMark = new object[2];

            object[] Origins = new object[2];

            object[] BodyName = new object[2];

            boolstatus = swModelDocExt.SelectByID2("", "PLANE", 0, 0, 0.1, true, 1, null, 0);

            vResultingBodies = (object[])swModel.FeatureManager.PreSplitBody();

            BodiesToMark[0] = vResultingBodies[0];

            BodiesToMark[1] = vResultingBodies[1];

            BodyName[0] = "";

            BodyName[1] = "";

            Origins[0] = null;

            Origins[1] = null;

            vBodiesToMark = BodiesToMark;

            vOrigins = Origins;

            vBodyName = BodyName;

            swFeature = (Feature)swModel.FeatureManager.PostSplitBody((BodiesToMark), (false), (Origins), (BodyName));

        }

        ///

        public SldWorks swApp;

    }

}