FlexCelAspViewer.MaxTemporaryImages Property
Maximum number of temporary images in the images folder. Set it to 0 or a negative value if you want unlimited images. Use this variable to avoid Denial of Service conditions. For example, a malicious user could keep continuously refreshing the webpage, without waiting for the page to load. As all images are created each time he refreshes, but they are never deleted (because they are never requested back) the disk could fill very fast, not giving time to the ImageTimeout timespan to happen, and crashing the server.
Note that this number is approximate, if for example the maximum is 5000, you could get 5200 images in a peak time. It is not guaranteed that the maximum images will be 5000, just that it will not grow much more than that.
Syntax
Namespace: FlexCel.AspNet
public Int32 MaxTemporaryImages { get; set; }