C# 2005-Windows Application-imagelist settings problems

[wolffy]

okay heres my problem;
i want to add image K to a imagelist, thats easy. The hard part is that the imagelist was made in Application Settings. **I made the imagelist in application settings so i could eventually add in code which would make its value saved when the form closes** But every time i use something like this

image k = toolstrip1.backgroundimage;
Settings.Default.kill.Images.Add(k);
 

**kill is the name of the imagelist**
i get this error which says- "Null reference was unhandled". The problem isnt with the image k, its with the kill imagelist.
In the application settings, i cant seem to even give imagelist a value and it seems to me the only time i can even give it a value is before the image starts.
So how can i add a value to the imagelist, without getting this error or any error