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Add Attribute to Feature and Include in Library Feature Example (C#)

This example shows how to add an attribute to a feature and include that attribute with the feature if the feature is saved as a library feature. This example also includes instructions on how to verify that the attribute is included on each instance of the library feature.

// Preconditions:
// 1. Open a new part document.
// 2. Sketch a rectangle and extrude it.
// 3. Sketch a straight slot that fits on a face of
//    of the just-created extrude and cut-extrude the slot.
//    The cut-extrude should be named Cut-Extrude1.
// 4. Open the Immediate window.
// 5. Run the macro.
// Postconditions:
// 1. The Cut-Extrude1 feature is added to the part document with
//    an attribute of TestAttribute, which is visible in the
//    FeatureManager design tree.
// 2. Examine the Immediate window.
// To verify that the attribute is included in a library feature:
// 1. Drag the Cut-Extrude1 feature to the Design Library and
//    save the library feature.
// 2. Close the part document.
// 3. Open an existing model document and drag-and-drop the 
//    just-created library feature on the model.
// 4. Expand the just-dropped library feature in the FeatureManager 
//    design tree. Cut-Extrude1 and TestAttribute should appear beneath 
//    the just-dropped library feature in the FeatureManager design tree.
// 5. Close the model document.
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Diagnostics;
using System;
namespace NameAttributeCSharp.csproj
    partial class SolidWorksMacro
        public void Main()
            ModelDoc2 swModel = default(ModelDoc2);
            ModelDocExtension swModelDocExt = default(ModelDocExtension);
            SelectionMgr swSelectionMgr = default(SelectionMgr);
            Feature swFeature = default(Feature);
            SolidWorks.Interop.sldworks.Attribute swAttribute = default(SolidWorks.Interop.sldworks.Attribute);
            AttributeDef swAttributeDef = default(AttributeDef);
            Face2 swFace = default(Face2);
            Parameter swParameter = default(Parameter);
            Object[] Faces = null;
            bool @bool = false;

            swModel = (ModelDoc2)swApp.ActiveDoc;
            swModelDocExt = swModel.Extension;
            swSelectionMgr = (SelectionMgr)swModel.SelectionManager;
            // Create attribute 
            swAttributeDef = (AttributeDef)swApp.DefineAttribute("TestPropagationOfAttribute");
            @bool = swAttributeDef.AddParameter("TestAttribute", (int)swParamType_e.swParamTypeDouble, 2.0, 0);
            @bool = swAttributeDef.Register();
            // Select the feature to which to add the attribute 
            @bool = swModelDocExt.SelectByID2("Cut-Extrude1""BODYFEATURE", 0, 0, 0, false, 0, null, 0);
            swFeature = (Feature)swSelectionMgr.GetSelectedObject6(1, -1);
            Debug.Print("Name of feature to which to add attribute: " + swFeature.Name);
            // Add the attribute to one of the feature's faces 
            Faces = (Object[])swFeature.GetFaces();
            swFace = (Face2)Faces[0];
            swAttribute = swAttributeDef.CreateInstance5(swModel, swFace, "TestAttribute", 0, (int)swInConfigurationOpts_e.swAllConfiguration);
            swAttribute.IncludeInLibraryFeature = true;
            Debug.Print("Include attribute in library feature? " + swAttribute.IncludeInLibraryFeature);
            Debug.Print("Name of attribute: " + swAttribute.GetName());

            // Get name of parameter
            swParameter = (
 Debug.Print("Parameter name: " + swParameter.GetName());

        public SldWorks swApp;

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