c# image.clone out memory exception

why am i removing an out memory exception?

so dies c# initial through:

splitbitmaps.add(neededimage.clone(rectdimensions, neededimage.pixelformat));

where splitbitmaps list<bitmap> nonetheless works vb during slightest 4 iterations:

arlsplitbitmaps.add(image.clone(rectdimensions, image.pixelformat))

where arlsplitbitmaps rudimentary array list. (and approbation i've attempted arraylist c#)

this fullsection:

for (int32 splitindex = 0; splitindex <= numberofresultingimages - 1; splitindex++)
{ 
  rectangle rectdimensions;

  (splitindex < numberofresultingimages - 1) 
  {
    rectdimensions = new rectangle(splitimagewidth * splitindex, 0, 
      splitimagewidth, splitimageheight); 
  } 
  else 
  {
    rectdimensions = new rectangle(splitimagewidth * splitindex, 0, 
     sourceimagewidth - (splitimagewidth * splitindex), splitimageheight); 
  } 

  splitbitmaps.add(neededimage.clone(rectdimensions, neededimage.pixelformat)); 

}

neededimage bitmap way.

i can't any useful answers intarweb, generally since works only glorious vb.

update:

i indeed found reason (sort of) operative nonetheless forgot post it. converting settlement bitmap instead only perplexing reflection tender settlement i remember.