c# - Save dictionary in application settings and load it on start -

i've got dictionary<string, double> save , restore when restart application. have heard cannot store dictionary in c#, trying make workaround.

currently have made string variable in setting called db, , trying use this:

var settings = dict.toarray();  var prop = properties.settings.default.db; 

and make prop = settings;

thus far have done this, although working..

private void savesettings() {     var settings = spampercentage.toarray();      var prop = properties.settings.default.db;      string res = string.join(",", settings);      prop = res; }  private void loadsettings() {     var prop = properties.settings.default.db;      var dictionary = prop.todictionary(item => item.key,                                item => item.value); } 

edit values in dictionary looks this:

{[john, 0,53]} {[ivone, 0,44]} etc. 

@edit using julien json idea, have made:

 string prop = properties.settings.default.db;     private void savesettings()     {          prop = jsonconvert.serializeobject(dict); properties.settings.default.save();     }      private void loadsettings()     {         dict= jsonconvert.deserializeobject<dictionary<string, double>>(prop);     } 

when hit program, , use savesettings method, can see has values. reboot program, , try loadsettings , null.

i had similar problem while ago. ended using json serialization serialize dictionary string, store in application settings, , deserialize dictionary when needed it.

string strdictionaryasstring = jsonconvert.serializeobject(dtndictionary);  var dtndictionary = jsonconvert.deserializeobject<dictionary<string, double>>(strdictionaryasstring );