line for dimension

[will_smith3691215]

I'm trying to add a line for the size, but I can't do it, I haven't had any result for two weeks, please help me.
I am sure that there is an answer to my question on the Internet, but since I am not a native English speaker, it is difficult for me to understand the information that I find, and in everything that I manage to figure out, there is no answer to my questions.

foreach (var copiedPair in copiedElements)
{
    Element copiedElement = doc.GetElement(copiedPair.Value);

    BoundingBoxXYZ boundingBox = copiedElement.get_BoundingBox(duplicatedLegend);
    if (boundingBox == null) continue;

    Options options = new Options { View = duplicatedLegend, ComputeReferences = true };
    GeometryElement geom = copiedElement.get_Geometry(options);

    //списки для линий и их references
    List<Line> lines = new List<Line>();
    List<Reference> lineReferences = new List<Reference>();

    foreach (GeometryObject go in geom)
    {
        if (go is Line lineGeom)
        {
            lines.Add(lineGeom);
            lineReferences.Add(lineGeom.Reference);
        }
        else if (go is GeometryInstance instance)
        {
            foreach (GeometryObject nestedGo in instance.GetInstanceGeometry())
            {
                if (nestedGo is Line nestedLine)
                {
                    lines.Add(nestedLine);
                    lineReferences.Add(nestedLine.Reference);
                }
            }
        }
    }
    
    for (int i = 0; i < lines.Count; i++)
    {
        for (int j = i + 1; j < lines.Count; j++)
        {
            Line line1 = lines[i];
            Line line2 = lines[j];

            //direction - возвращает направление линии
            XYZ direction1 = line1.Direction;
            XYZ direction2 = line2.Direction;

            if (direction1.IsAlmostEqualTo(direction2) || direction1.IsAlmostEqualTo(-direction2))
            {
                ReferenceArray array = new ReferenceArray();
                array.Append(lineReferences[i]);
                array.Append(lineReferences[j]);


                //line for dimension

                //Line line = Line.CreateBound(boundingBox.Min, boundingBox.Max);

                XYZ start = line1.GetEndPoint(0);
                XYZ end = start + direction1.CrossProduct(XYZ.BasisZ); //поворот на 90 градусов по оси Z (векторное произведение двух векторов = вектор, перепендикулярный к обоим векторам)
                Line line = Line.CreateBound(start, end);

                //XYZ start = line1.GetEndPoint(0);
                //XYZ end = line2.GetEndPoint(1);
                //Line line = Line.CreateBound(start, end);

                //XYZ start = new XYZ(boundingBox.Min.X, boundingBox.Min.Y, boundingBox.Min.Z);
                //XYZ end = new XYZ(boundingBox.Max.X, boundingBox.Min.Y, boundingBox.Min.Z);
                //Line line = Line.CreateBound(start, end);

                Dimension dimension = doc.Create.NewDimension(duplicatedLegend, line, array);
            }
        }
    }

    doc.Regenerate();
}

I will be grateful for any hint and help