C# with AUTOCAD Attribute in block gets corrupted during mirroring

Question

1. public class ClassAdı

2. {
   

3. [CommandMethod("DOOR")]
4. public static void Door()

5.     {
   

6. double bölge = 0, derece = 0; string block_name = "DOOR";
7. var doc = Application.DocumentManager.MdiActiveDocument;
8. var db = doc.Database;
9. var ed = doc.Editor;
10. var ppo = new PromptPointOptions("\nKonum seç: ");
11. var ppr = ed.GetPoint(ppo);
12. if (ppr.Status == PromptStatus.OK)

13.         {
    

14. Point3d pt_start = ppr.Value;
15. ppo.Message = "\nEnd Point: ";
16. ppo.BasePoint = pt_start;
17. ppo.UseBasePoint = true;
18. ppr = ed.GetPoint(ppo);
19. Point3d pt_end = ppr.Value;
20. derece = Vector3d.XAxis.GetAngleTo(pt_start.GetVectorTo(pt_end), Vector3d.ZAxis) *
21. 180 / Math.PI;
22. bölge = (derece / 45); bölge = bölge - (bölge % 1);
23. if (ppr.Status == PromptStatus.OK)

24.             {
    

25. using (var tr = db.TransactionManager.StartTransaction())

26.                 {
    

27. var cSp = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
28. var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
29. var br = new BlockReference(pt_start, bt[block_name]);
30. Bölgeler >>> 0 dan baslıyor. Blogun kendisi 0 bölgesinde oldugu için 0. kosulu yazmadık.
31. if (bölge == 1)

32.                     {
    

33. Point3d pt_m1 = new Point3d(pt_start.X - 1, pt_start.Y - 1, 0);
34. Point3d pt_m2 = new Point3d(pt_start.X + 1, pt_start.Y + 1, 0);
35. Line3d acLine3d = new Line3d(pt_m1, pt_m2);
36. br.TransformBy(Matrix3d.Mirroring(acLine3d));

37.                     }
    

38. if (bölge == 2)
39. br.Rotation = (Math.PI / 2); }
40. if (bölge == 3)

41.                     {
    

42. br.Rotation = (Math.PI / 2);
43. Point3d pt_m1 = new Point3d(pt_start.X + 1, pt_start.Y - 1, 0);
44. Point3d pt_m2 = new Point3d(pt_start.X - 1, pt_start.Y + 1, 0);
45. Line3d acLine3d = new Line3d(pt_m1, pt_m2);
46. br.TransformBy(Matrix3d.Mirroring(acLine3d));

47.                     }
    

48. if (bölge == 4)tag-name
49. br.Rotation = (Math.PI); Application.SetSystemVariable("MIRRTEXT",1); }
50. if (bölge == 5)

51.                     {
    

52. br.Rotation = (Math.PI);
53. Point3d pt_m1 = new Point3d(pt_start.X - 1, pt_start.Y - 1, 0);
54. Point3d pt_m2 = new Point3d(pt_start.X + 1, pt_start.Y + 1, 0);
55. Line3d acLine3d = new Line3d(pt_m1, pt_m2);
56. br.TransformBy(Matrix3d.Mirroring(acLine3d));

57.                     }
    

58. if (bölge == 6)
59. br.Rotation = (Math.PI * 3 / 2); }
61. if (bölge == 7)

62.                     {
    

63. br.Rotation = (Math.PI * 3 / 2);
64. Point3d pt_m1 = new Point3d(pt_start.X + 1, pt_start.Y - 1, 0);
65. Point3d pt_m2 = new Point3d(pt_start.X - 1, pt_start.Y + 1, 0);
66. Line3d acLine3d = new Line3d(pt_m1, pt_m2);
67. br.TransformBy(Matrix3d.Mirroring(acLine3d));

68.                     }
    

69. cSp.AppendEntity(br);
70. tr.AddNewlyCreatedDBObject(br, true);
71. tr.Commit();

72.                 }
    

73.             }
    

74.         }
    

75.     }