private IPolyline GetStationPipePointCol(string stationName)
{
   IPolyline result = (IPolyline) new Polyline();
   IGeoDataset pGDS = (IGeoDataset) m_pipesFC;
   result.SpatialReference = pGDS.SpatialReference;
   IPointCollection pipePointCol = (IPointCollection)result;

   // Get all pipes in the named station
   IQueryFilter pPipeQF = new QueryFilter();
   pPipeQF.WhereClause = "StationName = '" + stationName + "'";
   IFeatureCursor pPipeCur = m_pipesFC.Search(pPipeQF, true);
   IFeature pPipeFea = pPipeCur.NextFeature();
   while (pPipeFea != null)
   {
      // Add all points from each pipe to the station-wide point collection
      IPolyline pDiscretePipePline = (IPolyline)pPipeFea.ShapeCopy;
      IPointCollection pDiscretePipePtCol = (IPointCollection)pDiscretePipePline;
      for (int idx = 0; idx < pDiscretePipePtCol.PointCount; idx++)
         pipePointCol.AddPoint(pDiscretePipePtCol.Point[idx]);
         pPipeFea = pPipeCur.NextFeature();
   }
   Marshal.ReleaseComObject(pPipeCur);
   return result;
}