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Im quit new to AutoCad and now i want do get a collection of all blocks wich are inside another block in my C#/.NET Plugin. I found a way to get all blocks in a Polyline (thanks to _gile https://forums.autodesk.com/t5/net/find-block-inside-a-polyline/td-p/7586489).
Now i want to apply the same principle to the outline of a specific block.
Block Edit View of Block Room A
See attached Block RoomA.png
Example i want to get de Blocks marked with pink.
See attached Example1.png
So my idea is to somhow geht de outlining lines of the block to form a new poly line and then use the solution from _gile mentioned above. I have acces to all room block in my file as they are all on the same layer.
Thanks for your help!