diff --git a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/BoundingInfo.cs b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/BoundingInfo.cs
index bf10c2ed46acf934c25ef87fd1de125622b7f4ab..146cd904618c31b4e8403d8b018b60fe75bf6975 100644
--- a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/BoundingInfo.cs
+++ b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/BoundingInfo.cs
@@ -90,19 +90,23 @@ public struct BoundingInfo
     #endregion
 
     /// <summary>
-    /// 高
+    /// 高 y增量
     /// </summary>
-    public readonly double Height => Math.Abs(MaxX - MinX);
+    public readonly double Height => MaxY > MinY ? MaxY - MinY : 0;
 
     /// <summary>
-    /// 宽
+    /// 宽 x增量
     /// </summary>
-    public readonly double Width => Math.Abs(MaxY - MinY);
+    public readonly double Width => MaxX > MinX ? MaxX - MinX : 0;
 
     /// <summary>
     /// 面积
     /// </summary>
     public readonly double Area => Height * Width;
+    /// <summary>
+    /// 是否有效
+    /// </summary>
+    public readonly bool IsEffective => MinX <= MaxX;
 
     /// <summary>
     /// 3D包围盒
diff --git a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityBoundingInfo.cs b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityBoundingInfo.cs
index 43c4f31e8558f454df8d1a67f2a5883a5dcc91da..53628f36160f6f6dfc8d89fbedf4f86ae34329ca 100644
--- a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityBoundingInfo.cs
+++ b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityBoundingInfo.cs
@@ -98,7 +98,6 @@ static void GetBlockBox(this Entity en, ref Extents3d ext, ref Matrix3d mat)
             if (block.BlockTableRecord.GetObject<BlockTableRecord>() is BlockTableRecord btr)
                 foreach (ObjectId id in btr)
                 {
-                    id.GetObject<Entity>();
                     if (id.GetObject<Entity>() is Entity ent1)
                     {
                         if (ent1.Visible != true)
@@ -233,7 +232,7 @@ public static Point3d[] GetMTextBoxCorners(this MText mtext)
     {
         if (ent is BlockReference block)
         {
-            Extents3d blockExt = default;
+            Extents3d blockExt = new Extents3d();
             var mat = Matrix3d.Identity;
             block!.GetBlockBox(ref blockExt, ref mat);
             if (blockExt.IsEmptyExt())