Share a object between Main and Child window as a means of passing data back and forth (C#) -

this problem has 3 files:

• options.cs (a datastore option values)

• mainwindow.cs (the main window program, appearnce modified based on options inside options datastore - once class decalred object)

• optionswindow.cs (the child window user sets option value, window saves changes options datastore when user presses button inside window)

what want share data between main window form , child window form in c#. main window called mainwindow , child window optionswindow.

i have data store called options. object stores various user options. (some type int , bool) these options used mainwindow appearance purposes.

so user makes changes in optionswindow , these variables changes saved in useroptions object of type options declared inside optionswindow.

i did because need easy , simple way move set data in childwindow, save data object , use data in mainwindow

why did not declare useroptions object inside mainwindow? because can't access data declared in mainwindow unless make object public says never ever do. have tried making useroptions object inside optionswindow , exposing varaibles (data) through properties.

this works. can access , set properties both optionswindow , mainwindow.

whats problem? optionswindow.show(); can used once, after c# not let ever work again, reason once use only. seems object useroptions being destroyed once form closes.

mainwindow.cs

public partial class mainwindow : form     {         optionswindow optionswindow = new optionswindow(); 

optionswindow declares object useroptions of type options. datastore. rest of optionswindow getting user data , adding data options datastore

public partial class optionswindow : form     {         options useroptions = new options();          public bool allowtooltip         {             { return useroptions.allowtooltips; }             set { useroptions.allowtooltips = value; }         } 

i call optionswindow this: (note works once because of exceptions errors, apparently c# can't reuse child objects. confusing me)

private void optionstoolstripmenuitem1_click(object sender, eventargs e)         {             try             {                 optionswindow.show();// stops working after first call             }             catch { };          } 

i have been working on code 4 hours trying everything.

all want have data store of user options of various types , use options window set options , main window read options.

that want do.

set variables shared datastore inside child window , access datastore in main window.

the data store object.

is fixable? or there better way data child-window can accessed both child-window , main-window.

edit: ended making datastore public because code becoming convoluted.

try adding options property optionswindow form.

public partial class optionswindow : form {     public options { get; set; }      public bool allowtooltip     {         { return options.allowtooltips; }         set { options.allowtooltips = value; }     } } 

in mainwindow set options , read when done.

private void optionstoolstripmenuitem1_click(object sender, eventargs e) {         optionswindow.options = myoptions;         optionswindow.showdialog();         myoptions = optionswindow.options;  }