Hi,I am building a suite of Add-Ins. This one is to make a back up of a selected layer. When the tool is run the backed up feature class is added to the mxd. I don't want it to be added to the map document and I can't figure out why it is being added. Any suggestions? public static IWorkspace FileGdbWorkspaceFromPath(String path) { Type factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBWorkspaceFactory"); IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType); return workspaceFactory.OpenFromFile(path, 0); } public IFeatureClass GetFeatureClassOfSelectedFeatureLayer(IFeatureLayer featureLayer) { IFeatureClass featureClass = featureLayer.FeatureClass; return featureClass; } protected override void OnClick() { IWorkspace workSpace = FileGdbWorkspaceFromPath(@G:\PROJECTS\SCHOOL_SAFETY_MAPPING_APPLICATION_20120606\DATA\SchoolSafety.gdb); CreateFeatureClass(workSpace, "SelectedLayerBU"); } public void CreateFeatureClass(IWorkspace workspace, String featureClassName) { IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace; IWorkspace2 pWorkspace2 = workspace as IWorkspace2; ////Delete the Feature Class if it already exists//// if (pWorkspace2.get_NameExists(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTFeatureClass, "SelectedLayerBU")) { FeatureClass featureC = (FeatureClass)featureWorkspace.OpenFeatureClass("SelectedLayerBU"); IDataset dataSet; ISchemaLock schemaLock = (ISchemaLock)featureC; dataSet = featureC; dataSet.Delete(); schemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock); } IFeatureClass featureSelected = GetFeatureClassOfSelectedFeatureLayer((IFeatureLayer)ArcMap.Document.SelectedLayer); try { featureWorkspace.CreateFeatureClass("SelectedLayerBU", featureSelected.Fields, featureSelected.CLSID, featureSelected.EXTCLSID, featureSelected.FeatureType, featureSelected.ShapeFieldName, null); Geoprocessor gp = new Geoprocessor(); gp.SetEnvironmentValue("workspace", @G:\PROJECTS\SCHOOL_SAFETY_MAPPING_APPLICATION_20120606\DATA\SchoolSafety.gdb); Append append = new Append(); //this tool uploads the feature class append.inputs = featureSelected; append.target = @G:\PROJECTS\SCHOOL_SAFETY_MAPPING_APPLICATION_20120606\DATA\SchoolSafety.gdb\SelectedLayerBU; gp.Execute(append, null); } catch (Exception exc) { MessageBox.Show(Convert.ToString(exc)); return; }Thanks,Robbie