给我写一个在revit中C#写的拾取cad墙线图层将其翻模的代码

以下是在Revit中使用C#编写的拾取CAD墙线图层并将其翻模的代码示例：

//获取当前文档
Document doc = this.ActiveUIDocument.Document;

//打开CAD文件
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "CAD文件|*.dwg";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
    string cadFilePath = openFileDialog.FileName;
    //创建CAD导入选项
    DWGImportOptions importOptions = new DWGImportOptions();
    importOptions.ColorMode = ImportColorMode.Preserved;
    importOptions.LayerOption = ImportLayerOption.Merge;
    importOptions.OrientToView = true;
    //导入CAD文件
    Transaction trans = new Transaction(doc);
    trans.Start("导入CAD文件");
    ImportInstance importInstance = ImportInstance.Create(doc, cadFilePath, importOptions);
    trans.Commit();

    //选择CAD墙线图层
    UIDocument uiDoc = this.ActiveUIDocument;
    Selection sel = uiDoc.Selection;
    ICollection<ElementId> ids = sel.PickObjects(ObjectType.Element, new WallFilter(), "选择CAD墙线图层");

    //创建墙体
    trans = new Transaction(doc);
    trans.Start("创建墙体");
    foreach (ElementId id in ids)
    {
        Element elem = doc.GetElement(id);
        if (elem is CurveElement)
        {
            CurveElement curveElem = elem as CurveElement;
            Curve curve = curveElem.GeometryCurve;

            //创建墙体
            Wall wall = Wall.Create(doc, curve, LevelId, false);
            if (wall != null)
            {
                //将墙体的高度设置为默认高度
                Parameter heightParam = wall.get_Parameter(BuiltInParameter.WALL_USER_HEIGHT_PARAM);
                if (heightParam != null)
                {
                    heightParam.Set(DefaultWallHeight);
                }
            }
        }
    }
    trans.Commit();
}

在此代码中，我们首先打开CAD文件并将其导入到Revit中。然后，我们选择CAD墙线图层并创建相应的Revit墙体。在创建墙体时，我们还可以设置其高度，这里我们将其设置为默认高度。