C# Image.Clone Out of Memory Exception

Question

Why am I getting an out of memory exception?

So this dies in C# on the first time through:

splitBitmaps.Add(neededImage.Clone(rectDimensions, neededImage.PixelFormat));

Where splitBitmaps is a List<BitMap> BUT this works in VB for at least 4 iterations:

arlSplitBitmaps.Add(Image.Clone(rectDimensions, Image.PixelFormat))

Where arlSplitBitmaps is a simple array list. (And yes I've tried arraylist in c#)

This is the fullsection:

for (Int32 splitIndex = 0; splitIndex <= numberOfResultingImages - 1; splitIndex++) {    Rectangle rectDimensions;    if (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 is a Bitmap by the way.

I can't find any useful answers on the intarweb, especially not why it works just fine in VB.

Update:

I actually found a reason (sort of) for this working but forgot to post it. It has to do with converting the image to a bitmap instead of just trying to clone the raw image if I remember.

Answer 1

Clone() may also throw an Out of memory exception when the coordinates specified in the Rectangle are outside the bounds of the bitmap. It will not clip them automatically for you.