c# - Passing data between WPF windows using events with custom delegate type -


i'm passing text sub window main window using events , delegates i'm getting following error:

the type or namespace name 'textupdateeventargs' not found (are missing using directive or assembly reference?)

can me this?

mainwindow.cs code

namespace passing_data_btw_events {     /// <summary>     /// interaction logic mainwindow.xaml     /// </summary>     public partial class mainwindow : window     {         public mainwindow()         {             initializecomponent();         }          private void menuitem_click_1(object sender, eventargs e)         {             subwindow f = new subwindow();             f.textupdated += new subwindow.textupdatehandler(textform_buttonclicked);             f.show();         }          // handles event subwindow         public void textform_buttonclicked(object sender, textupdateeventargs e)         {              // update window values event args             //txtname.text = e.name;             treeviewitem child = new treeviewitem();             child.header = e.name;              treeview2.items.add(child);         }     } }

subwindow.cs code

namespace passing_data_btw_events {     public partial class subwindow : window     {         //adding delegate         public delegate void textupdatehandler(object sender, textupdateeventargs e);          // add event of delegate type         public event textupdatehandler textupdated;          public subwindow()         {             initializecomponent();         }          public void add_click(object sender, eventargs e)         {             // button click event handler raise              // event can intercepted listeners              // read textboxes , set member             // variables             string newtextbox = nametextbox.text;              // instance event args , pass each value             textupdateeventargs args = new textupdateeventargs(newtextbox);              // raise event updated arguments             textupdated(this,args);            //  this.close();         }          public class textupdateeventargs : system.eventargs         {             public string mname;              public textupdateeventargs(string sname)             {                 this.mname = sname;             }              public string name             {                                 {                     return mname;                 }            }       }    } }

textupdatehandler , textupdateeventargs nested types because declared inside subwindow class. referred delegate correctly using subwindow.textupdatehandler. same event type:

public void textform_buttonclicked(object sender, subwindow.textupdateeventargs e) { }

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