ArcMapAddinDistanceAndDirection.Models.FeatureClassUtils.ExportToShapefile C# (CSharp) Method

        private IFeatureClass ExportToShapefile(string fileNamePath, List<Graphic> graphicsList, ISpatialReference ipSpatialRef)
        {
            int index = fileNamePath.LastIndexOf('\\');
            string folder = fileNamePath.Substring(0, index);
            string nameOfShapeFile = fileNamePath.Substring(index + 1);
            string shapeFieldName = "Shape";
            IFeatureClass featClass = null;

            using (ComReleaser oComReleaser = new ComReleaser())
            {
                try
                {
                    IWorkspaceFactory workspaceFactory = null;
                    workspaceFactory = new ShapefileWorkspaceFactoryClass();
                    IWorkspace workspace = workspaceFactory.OpenFromFile(folder, 0);
                    IFeatureWorkspace featureWorkspace = workspace as IFeatureWorkspace;
                    IFields fields = null;
                    IFieldsEdit fieldsEdit = null;
                    fields = new Fields();
                    fieldsEdit = (IFieldsEdit)fields;
                    IField field = null;
                    IFieldEdit fieldEdit = null;
                    field = new FieldClass();///###########
                    fieldEdit = (IFieldEdit)field;
                    fieldEdit.Name_2 = "Shape";
                    fieldEdit.Type_2 = (esriFieldType.esriFieldTypeGeometry);
                    IGeometryDef geomDef = null;
                    IGeometryDefEdit geomDefEdit = null;
                    geomDef = new GeometryDefClass();///#########
                    geomDefEdit = (IGeometryDefEdit)geomDef;

                    //This is for line shapefiles
                    geomDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolyline;
                    geomDefEdit.SpatialReference_2 = ipSpatialRef;

                    fieldEdit.GeometryDef_2 = geomDef;
                    fieldsEdit.AddField(field);

                    ////Add another miscellaneous text field
                    //field = new FieldClass();
                    //fieldEdit = (IFieldEdit)field;
                    //fieldEdit.Length_2 = 30;
                    //fieldEdit.Name_2 = "TextField";
                    //fieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
                    //fieldsEdit.AddField(field);

                    featClass = featureWorkspace.CreateFeatureClass(nameOfShapeFile, fields, null, null, esriFeatureType.esriFTSimple, shapeFieldName, "");

                    foreach (Graphic graphic in graphicsList)
                    {
                        IFeature feature = featClass.CreateFeature();

                        feature.Shape = graphic.Geometry;
                        feature.Store();
                    }

                    IFeatureLayer featurelayer = null;
                    featurelayer = new FeatureLayerClass();
                    featurelayer.FeatureClass = featClass;
                    featurelayer.Name = featClass.AliasName;

                    System.Runtime.InteropServices.Marshal.FinalReleaseComObject(workspace);
                    workspace = null;
                    GC.Collect();

                    return featClass;
                }
                catch (Exception ex)
                {
                    return featClass;
                }
            }
        }