GetParameterValue DynamoRevit C#

GetParameterValue DynamoRevit C#.cs

public static object GetParameterValue(Autodesk.Revit.DB.Parameter param)
        {
            object result;
            switch (param.StorageType)
            {
                case StorageType.ElementId:
                    int valueId = param.AsElementId().IntegerValue;
                    if (valueId > 0)
                    {
                        var elem = ElementIDLifecycleManager<int>.GetInstance().GetFirstWrapper(valueId) as Element;
                        result = ElementSelector.ByElementId(valueId, elem == null ? true : elem.IsRevitOwned);
                    }
                    else
                    {
                        int paramId = param.Id.IntegerValue;
                        if (paramId == (int)BuiltInParameter.ELEM_CATEGORY_PARAM || paramId == (int)BuiltInParameter.ELEM_CATEGORY_PARAM_MT)
                        {
                            var categories = DocumentManager.Instance.CurrentDBDocument.Settings.Categories;
                            result = new Category(categories.get_Item((BuiltInCategory)valueId));
                        }
                        else
                        {
                            result = param.AsValueString();
                        }
                    }
                    break;
                case StorageType.String:
                    result = param.AsString();
                    break;
                case StorageType.Integer:
                    result = param.AsInteger();
                    break;
                case StorageType.Double:
                    result = param.AsDouble() * Revit.GeometryConversion.UnitConverter.HostToDynamoFactor(param.Definition.GetSpecTypeId());
                    break;
                default:
                    throw new Exception(string.Format(Properties.Resources.ParameterWithoutStorageType, param));
            }
            return result;