Custom Character map prob

[csharps]

I m creating a custom character map in C# and WPF like the Character map utility in windows(but a rather basic one)

I m using the following code

for (int a = 0; a <256; a++)
            {
                SymbolClass s = new SymbolClass ();
//converting integer to respective asci characters
                s.Value = System.Convert.ToChar(a).ToString();
                SymbolList.Add(s);
            }
 

SymbolList is an object of ObservableCollection<SymbolClass >
SymbolClass :user defined class with Value as a property within the class

I am binding the SymbolItem to ListboxItem in the Xaml form.

The problem I am facing here is: In the dialog the listboxitem displays junk characters. I am not sure how to handle it. Can anyone help? I have attached the screenshot

[Rabbit]

ASCII contains unprintable characters. There's nothing you can do about that except to replace what's displayed with something else, say the Hex code or some unique icon.