c# - Binary Serialization, I think I almost have it working -

i've been following guide on binary serialization (this 1 here: http://www.codeproject.com/articles/1789/object-serialization-using-c) , think have working. when save file created, when try load, nothing loaded. feel i'm close getting working. advice appreciated. here's code:

save/load class

[serializable()] public class saveload : iserializable {     public int gameday = date.gameday;     public list<adventurer> adventurers = formmain.adventurermanager.adventurerlist;      public saveload()     {         gameday = 0;         adventurers = null;     }      public saveload(serializationinfo info, streamingcontext ctxt)     {         gameday = (int)info.getvalue("date", typeof(int));         adventurers = (list<adventurer>)info.getvalue("adventurers", typeof(list<adventurer>));     }      public void getobjectdata(serializationinfo info, streamingcontext ctxt)     {         info.addvalue("date", gameday);         info.addvalue("adventurers", adventurers);     } } 

save/load methods:

    void btnsavegame_click(object sender, eventargs e)     {         saveload save = new saveload();          stream stream = file.open("savegame.osl", filemode.create);         binaryformatter bformatter = new binaryformatter();          bformatter.serialize(stream, save);         stream.close();     }      void btnloadgame_click(object sender, eventargs e)     {         saveload load = new saveload();          stream stream = file.open("savegame.osl", filemode.open);         binaryformatter bformatter = new binaryformatter();          load = (saveload)bformatter.deserialize(stream);         stream.close();          date.calculatedate();          this.visible = false;         ((formmain)(this.parentform)).controlmainscreen.visible = true;     } 

i think may have initialization timing issue.

try either moving initialization of gameday , adventurers constructor or rid of nulling them out in constructor. once did following, code pretty works:

public saveload() {     //gameday = null;     //adventurers = null; } 

note had make sure adventurer class had serialization attribute.

here code serialization works me (i had create own adventurer class , replaced date string since couldn't figure out doing or coming from. populated adventurers list dummy data , commented out form stuff didn't have information on.

[serializable()] public class saveload : iserializable {     public string gameday = null;     public list<adventurer> adventurers = null;          //formmain.adventurermanager.adventurerlist;      public saveload()     {         gameday = "date";         adventurers = new list<adventurer>() { new adventurer { name = "a1", type = "t1" }, new adventurer { name = "a1", type = "t1" } }; ;     }      public saveload(serializationinfo info, streamingcontext ctxt)     {         gameday = (string)info.getvalue("date", typeof(string));         adventurers = (list<adventurer>)info.getvalue("adventurers", typeof(list<adventurer>));     }      public void getobjectdata(serializationinfo info, streamingcontext ctxt)     {         info.addvalue("date", gameday);         info.addvalue("adventurers", adventurers);     } } [serializable()] public class adventurer {     public string name { get; set; }     public string type { get; set; } }  private void btnloadgame_click(object sender, eventargs e)     {         saveload sl = new saveload();          stream stream = file.open("savegame.osl", filemode.open);         binaryformatter bformatter = new binaryformatter();          sl = (saveload)bformatter.deserialize(stream);         stream.close();          messagebox.show(sl.adventurers.count.tostring());         //date.calculatedate();          //this.visible = false;         //((form1)(this.parentform)).controlmainscreen.visible = true;      }      private void btnsavegame_click(object sender, eventargs e)     {         saveload sl = new saveload();          stream stream = file.open("savegame.osl", filemode.create);         binaryformatter bformatter = new binaryformatter();          bformatter.serialize(stream, sl);         stream.close();      }