AutoCAD .NET :: Processing Overkill / API - Leaking Memory Running A Never Ending Loop

I have a routine that runs a cycle through 36 large dynamic blocks, then finishes.  Somewhere in this code I'm either leaking memory, running a never ending loop, or AutoCAD gets stuck on something.  I have a 12gb machine, and this file only uses a few MB on the hard drive.  So even after I save and close the file, AutoCAD is using 100% of 1 core CPU (4 core i7) in 0 drawing state stuck at 11gb of Memory (Private Working Set).  So, What is this program doing in 0 drawing state, and how is my code responsible?  I have to kill it with task manager.
 
<CommandMethod("SetCurveOffset")> _ Public Shared Sub SetCurveOffset() Try Dim doc As Document = AApplication.DocumentManager.MdiActiveDocument Dim db As Database = doc.Database Using lock As DocumentLock = doc.LockDocument() Using trans As Transaction = db.TransactionManager.StartTransaction Dim bt As BlockTable = trans.GetObject(db.BlockTableId, OpenMode.ForRead) Dim btrModelSpace As BlockTableRecord = trans.GetObject(bt(BlockTableRecord.ModelSpace), OpenMode.ForWrite) Dim curves As New List(Of
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