ArcEngine 10.2.2 好像发现一个BUG，在进行空间查询（SelectLayerByLocation）之后无法进行融合（Dissolve）

弄了个小工具，大概的过程就是
利用GP的空间查询（SelectLayerByLocation）功能
将与A图层相交的B图层中的所有要素导出到新MDB个人数据库中
然后进行GP融合操作，每次到这一步一直假死状态。
现在问题就出现在这里，GP进行空间查询之后，其他工具都能使用，比例AddField、CalculateField等都可以使用，唯独Dissolve不可以使用。
有哪位大神碰到过这种问题，如何解决的？
 
代码：
 /// <summary> 按位置选择图层至新要素类 </summary>
        public static void SelectByLocationAndCopyToFeatureClass(Geoprocessor pGeoprocessor, object OutFeaturePath, object SelectPath, string OverlapType, string Out)
        {
            ESRI.ArcGIS.DataManagementTools.MakeFeatureLayer pMakeFeatureLayer_Select = new ESRI.ArcGIS.DataManagementTools.MakeFeatureLayer();
            pMakeFeatureLayer_Select.in_features = OutFeaturePath;
            try { pGeoprocessor.Execute(pMakeFeatureLayer_Select, null); }
            catch { }

            ESRI.ArcGIS.DataManagementTools.SelectLayerByLocation pSelectLayerByLocation = new ESRI.ArcGIS.DataManagementTools.SelectLayerByLocation();
            pSelectLayerByLocation.in_layer = pMakeFeatureLayer_Select.out_layer;
            pSelectLayerByLocation.select_features = SelectPath;
            pSelectLayerByLocation.overlap_type = OverlapType;
            pSelectLayerByLocation.selection_type = "NEW_SELECTION";
            try { pGeoprocessor.Execute(pSelectLayerByLocation, null); }
            catch { }
            
            ESRI.ArcGIS.DataManagementTools.CopyFeatures pCopyFeatures = new ESRI.ArcGIS.DataManagementTools.CopyFeatures();
            pCopyFeatures.in_features = pSelectLayerByLocation.out_layer_or_view;
            pCopyFeatures.out_feature_class = Out;
            try { pGeoprocessor.Execute(pCopyFeatures, null); }
            catch { }


            ESRI.ArcGIS.DataManagementTools.Dissolve pDissolve = new ESRI.ArcGIS.DataManagementTools.Dissolve();
            pDissolve.in_features = Out;
            pDissolve.out_feature_class = Out + "_Dissolve";
            pDissolve.dissolve_field = DissolveField;
            pDissolve.multi_part = "true";
            pDissolve.unsplit_lines = "false";
try { pGeoprocessor.Execute(pDissolve , null); }
            catch { }
        }