c# - System.Windows.Window.Activate() cannot implement Microsoft.Office.Interop.Word.Window.Activate() because it does not have the matching return type? -


//error occurred @ line 1:cannot implement'microsoft.office.interop.word.window.activate()' //because not have matching return type of 'void'. //someone me fix error

public partial class window1 : window  {     public window1()     {         initializecomponent();     }      private void btnselectword_click(object sender, routedeventargs e)     {         // initialize openfiledialog          openfiledialog openfiledialog = new openfiledialog();           // set filter , restoredirectory          openfiledialog.restoredirectory = true;         openfiledialog.filter = "word documents(*.doc;*.docx)|*.doc;*.docx";           bool? result = openfiledialog.showdialog();         if (result == true)         {             if (openfiledialog.filename.length > 0)             {                 txbselectedwordfile.text = openfiledialog.filename;             }         }      }

this problem can caused 2 namespaces microsoft.office.interop.word , system.windows. try following compiler choose correct type:

public partial class window1 : system.windows.window

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