问如何在程序集中查找mate实体的名称

EN

using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Diagnostics;

namespace SWquestion
{
    class Program
    {
        static void Main(string[] args)
        {
            // set up
            ModelDoc2 swModel = default;
            Mate2 swMate = default(Mate2);
            Feature swFeat = default;
            Feature swMateFeat = null;
            Feature swSubFeat = default;
            MateEntity2 swMateEnt = default;

            string fileName = null;
            int errors = 0;
            int warnings = 0;

            // Start SW
            SldWorks.SldWorks swApp;
            swApp = new SldWorks.SldWorks
            {
                Visible = false
            };

            //Open the assembly document :
            fileName = @"C:\Users\Public\Documents\SOLIDWORKS\SOLIDWORKS 2021\samples\tutorial\api\wrench.sldasm";
            swModel = (ModelDoc2)swApp.OpenDoc6(fileName, (int)swDocumentTypes_e.swDocASSEMBLY, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, "", ref errors, ref warnings);

            // Iterates through the FeatureManager design tree to find Mates
            swFeat = (Feature)swModel.FirstFeature();
            while ((swFeat != null))
            {
                if ("MateGroup" == swFeat.GetTypeName())
                {
                    swMateFeat = (Feature)swFeat;
                    break;
                }
                swFeat = (Feature)swFeat.GetNextFeature();
            }

            // grab first mate entity : can get parameters etc
            swSubFeat = (Feature)swMateFeat.GetFirstSubFeature();
            swMate = (Mate2)swSubFeat.GetSpecificFeature2();
            swMateEnt = swMate.MateEntity(0);

            // Mate entity reference has property value 'Mate reference'
            // But how is this object used?
            // https://help.solidworks.com/2021/English/api/sldworksapi/SolidWorks.Interop.sldworks~SolidWorks.Interop.sldworks.IMateEntity2~Reference.html
            object swRef = swMateEnt.Reference;
            Debug.Print("swRef: " + swRef.GetType()); // com_object

            // How to get the name??
            // perhaps https://help.solidworks.com/2021/English/api/sldworksapi/SolidWorks.Interop.sldworks~SolidWorks.Interop.sldworks.IMateReference_members.html
            // Tried various casts, all with error
            IMateReference ms = (IMateReference)swMateEnt.Reference; // error: Unable to cast COM object of type 'System.__ComObject' to interface type 'SolidWorks.Interop.sldworks.IMateReference'.
            // MateReference ms = (MateReference)swMateEnt.Reference; // com error  on cast
            // MateEntity2 ms = (MateEntity2)swMateEnt.Reference; // com error  on cast
            // ModelDoc2 ms = (ModelDoc2)swMateEnt.Reference; // com error  on cast
            // string[] ms = (string[])swMateEnt.Reference; // com error on cast from ComObject to string[]
            // double[] ms = (double[]) swMateEnt.Reference; // com error on cast

            // Try a different route from link below
            // https://help.solidworks.com/2021/English/api/sldworksapi/Get_Mate_Reference_Properties_Example_CSharp.htm
            //ModelDocExtension swModelDocExt = (ModelDocExtension)swModel.Extension;
            //SelectionMgr swSelMgr = (SelectionMgr)swModel.SelectionManager;
            //bool boolstatus = false;
            //string mtName = swSubFeat.Name;
            //boolstatus = swModelDocExt.SelectByID2(mtName, "MATE", 0, 0, 0, false, 0, null, 0);
            //Feature swFeature = (Feature)swSelMgr.GetSelectedObject6(1, -1);
            //MateReference swMateReference = (MateReference)swFeature.GetSpecificFeature2(); // error: 'Unable to cast COM object of type 'System.__ComObject' to interface type 'SolidWorks.Interop.sldworks.MateReference'.
        }
    }
}