C# Get object member from a dynamic block

[cobygiffordBLCGD]

I have a custom dynamic block.  Using c# I am able to iterate all instances of the dynamic block, get property and attributes values, etc.  As part of the dynamic block there are labels and line objects.  I need to get the bounds of the block.  However, when I do so the extents of the block are including all the of other members, thereby making the block larger than what I am trying to achieve.  What I really need is to get the bound of a specific member of the dynamic block which is a polyline.  I cannot figure out how to navigate the block programmatically to get to that object.  Any help would be great appreciated.  Thank you in advance.  I have also attached the .dwg file here.

[Gepaha · Accepted solution]

Take a look at this link, it might help:

https://forums.autodesk.com/t5/net/getting-the-extents-of-a-dynamic-block/td-p/12170940 

[cobygiffordBLCGD]

@Gepaha you are awesome! That's exactly what I needed (br.Explode(entitySet);) and could not figure out how to extract the correct objects.  Thank you very much, greatly appreciated!