https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6605374#M5103 i have collected the items through Navisworks API using C# code and i want to do save action. it is as same as right clicking in Sets -&gt; Save Selection option. Thu, 06 Oct 2016 12:43:01 GMT Anonymous 2016-10-06T12:43:01Z https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6605374#M5103 i have collected the items through Navisworks API using C# code and i want to do save action. it is as same as right clicking in Sets -&gt; Save Selection option. Thu, 06 Oct 2016 12:43:01 GMT https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6605374#M5103 Anonymous 2016-10-06T12:43:01Z https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6605414#M5104 Hi Dhineshsurya, I recommend that you read the article "Add search selectionset in .Net" <A href="http://adndevblog.typepad.com/aec/2012/08/add-search-selectionset-in-net.html" target="_blank">http://adndevblog.typepad.com/aec/2012/08/add-search-selectionset-in-net.html</A> In the article Xiaodong demonstrates the use of the SelectionSet object. br Ulrik Thu, 06 Oct 2016 12:54:30 GMT https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6605414#M5104 ulski1 2016-10-06T12:54:30Z https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6607187#M5105 Thanks alot... It is working fine.. Fri, 07 Oct 2016 03:07:14 GMT https://forums.autodesk.com/t5/navisworks-api-forum/save-selection-set-for-the-selected-items-through-c-api/m-p/6607187#M5105 Anonymous 2016-10-07T03:07:14Z