Out of memory

[smallbit]

Hello guys,
New riddle for you,

I am using a method to rotate images in a form.

private: System::Drawing::Image^ rotateImage(Image^ b, float angle)
        {
            //create a new empty bitmap to hold rotated image
			Bitmap^ returnBitmap = gcnew Bitmap(b->Width, b->Height);
            //make a graphics object from the empty bitmap
            Graphics^ g = Graphics::FromImage(returnBitmap);
            //move rotation point to center of image
			g->TranslateTransform((float)b->Width / 2, (float)b->Height / 2);
            //rotate
            g->RotateTransform(angle);
            //move image back
            g->TranslateTransform(-(float)b->Width / 2, -(float)b->Height / 2);
            //draw passed in image onto graphics object
           
			g->DrawImage(b, 0, 0);
			return returnBitmap;
	      }

and it goes good, but sometimes after some time running the program I get Out of Memory error in line

g->DrawImage(b, 0, 0);

Is this a disposal issue ? do you have any idea how to fix it ?

Thanks and best regards,
Smallbit