导入部件并创建添加到新建装配中

从atc文件中导入部件但挡墙dwg中，

工具选项板对应的atc文件与创建部件pkt文件中的atc文件稍有区别，

主要体现在dll文件的路径上，

另外数据类型名称，

需要首字母大写，

比如Double不能写成double，

如果是小写，

导入过程中识别不了部件的参数...

测试代码如下：

public void C_SaiTest()
{
    Document acDoc = Application.DocumentManager.MdiActiveDocument;
    Database acCurDb = acDoc.Database;
    Editor ed = acDoc.Editor;
    CivilDocument civilDoc = CivilApplication.ActiveDocument;
    var rootkey = HostApplicationServices.Current.UserRegistryProductRootKey;
    RegistryKey key = Registry.CurrentUser.OpenSubKey(rootkey);
    var rrf = key.GetValue("RoamableRootFolder").ToString();
    //部件的GUID
    string guid = "55729DA9-FCBF-465B-A4D1-E2E88DD56F50";

    using (Transaction tr = acDoc.TransactionManager.StartTransaction())
    {
        //ESSubassembly.atc为路基选项板对应的atc文件
        var saId = civilDoc.SubassemblyCollection.ImportSubassembly("双线铁路路基",
                    rrf + @"\Support\ToolPalette\Palettes\ESSubassembly.atc",
                        guid, Point3d.Origin);
        var id = civilDoc.AssemblyCollection.Add("双线铁路路基", AssemblyType.Other, Point3d.Origin);
        //var sa = saId.GetObject(OpenMode.ForWrite) as Subassembly;
        //ed.WriteMessage("\n" + sa.ParamsDouble.Count);
        var ass = id.GetObject(OpenMode.ForWrite) as Assembly;
        ass.AddSubassembly(saId);
        tr.Commit();
    }
}