c# - Small issue with listbox.sort and string compareto-function -

i'm having trouble differences in way listbox sort elements , compareto-function.

the thing is, using 2 listboxes, , trying make 2 lists of elements occurring in 1 of them. both listboxes sorted using sorted property.

my program runs through listboxes, , compare elements 1 one, using compareto-function:

if (listbox1.items[x].tostring().compareto(listbox2.items[y].tostring())) > 0 etc. 

now, works fine, except items containing apostrophe (') - in "donald's pizza":

in sorted listbox, "donald's pizza" comes before "donald duck". apostrophe less space. using compareto-function, "donald's pizza" greater "donald duck" . "compareto" says, apostrophe greater space !

this messes system.

if knew apostrophe causes problem, make workaround, i'm not secure if apply other characters too.

as solution i´ll have make own sort-procedure listboxes, overlooking obvious?

edit: answer.

i ended making own sort-procedure, based on compareto-function. way i'm sure sort of listbox 100% equal compareto-function use later.

    public listbox fn_sort_listbox(listbox par_listbox)     {         listbox lb_work = new listbox();         int in_index;         int in_compare;          if (par_listbox.items.count == 0) return lb_work;          foreach (object in par_listbox.items)         {             in_index = 0;             while (in_index < lb_work.items.count)             {                 in_compare = lb_work.items[in_index].tostring().compareto(i.tostring());                 if (in_compare > 0)                 {                     break;                 }                 in_index++;             }             lb_work.items.insert(in_index, i.tostring());         }          return lb_work;     } 

the example comparer on microsoft's site compares in same order listbox. code below produces "donald's pizza" before "donald duck".

  string[] strings = new string[2] { "donald duck", "donald's pizza" };   array.sort(strings, new mystringcomparer(compareinfo.getcompareinfo("en-us"),       compareoptions.stringsort));   foreach (string item in strings)     console.writeline(item); 

the mystringcomparer comes here , implemented as:

public class mystringcomparer : icomparer {   private compareinfo mycomp;   private compareoptions myoptions = compareoptions.none;    // constructs comparer using specified compareoptions.   public mystringcomparer(compareinfo cmpi, compareoptions options)   {     mycomp = cmpi;     this.myoptions = options;   }    // compares strings compareoptions specified in constructor.   public int compare(object a, object b)   {     if (a == b) return 0;     if (a == null) return -1;     if (b == null) return 1;      string sa = string;     string sb = b string;     if (sa != null && sb != null)       return mycomp.compare(sa, sb, myoptions);     throw new argumentexception("a , b should strings.");    } }