c# - Why treeview nodes imageindex property is not saved in serializing? -

i'm serializing treenode using function :

public static void savetree(treeview tree, string filename) {     using (stream file = file.open(filename, filemode.create))     {         binaryformatter bf = new binaryformatter();         bf.serialize(file, tree.nodes.cast<treenode>().tolist());     } } 

when deserialize using function :

    public static treeview loadtree(string filename)     {         treeview tree = new treeview();         using (stream file = file.open(filename, filemode.open))         {             binaryformatter bf = new binaryformatter();             object obj = bf.deserialize(file);              treenode[] nodelist = (obj ienumerable<treenode>).toarray();             tree.nodes.addrange(nodelist);         }         return tree;     } 

i didn't nodes imageindex value -1 nodes imageindex !
why ?

seems bug.

if set name property of each image in imagelist, , use imagekey , selectedimagekey properties nodes instead of imageindex , selectedimageindex, serialization work.

in code though, don't forget apply imagelist control treeview:

public static treeview loadtree(string filename, imagelist imagelist) {   treeview tree = new treeview();   tree.imagelist = imagelist;   ... }