Apply 'Extract interface'. Exception will occur. JetBrains.ReSharper.Util.InternalErrorException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index An exception has occurred ---> System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.ThrowHelper.ThrowArgumentOutOfRangeException() at System.Collections.Generic.List`1.get_Item(Int32 index) at System.Collections.ObjectModel.ReadOnlyCollection`1.System.Collections.Generic.IList<T>.get_Item(Int32 index) at JetBrains.ReSharper.UI.PopupList.Impl.JetPopupMenuDoc.FireExecuteAction(Int32 index) in c:\Agent\work\ReSharper-Main\src\IDECore\src\PopupList\Impl\JetPopupMenuDoc.cs:line 466 — End of inner exception stack trace — at JetBrains.ReSharper.Util.Logger.LogExceptionEx(Exception, String, Boolean) in c:\Agent\work\ReSharper-Main\src\Util\src\Logger.cs:line 343 column 9 at JetBrains.ReSharper.Util.Logger.LogException(Exception) in c:\Agent\work\ReSharper-Main\src\Util\src\Logger.cs:line 355 column 5 at JetBrains.ReSharper.UI.PopupList.Impl.JetPopupMenuDoc.FireExecuteAction(Int32) in c:\Agent\work\ReSharper-Main\src\IDECore\src\PopupList\Impl\JetPopupMenuDoc.cs:line 470 column 5 at JetBrains.ReSharper.UI.PopupList.Impl.JetPopupMenuDoc.ExecuteSelectedItem() in c:\Agent\work\ReSharper-Main\src\IDECore\src\PopupList\Impl\JetPopupMenuDoc.cs:line 165 column 5 at JetBrains.ReSharper.UI.PopupList.Impl.JetPopupMenuView.OnMouseUp(MouseEventArgs) in c:\Agent\work\ReSharper-Main\src\IDECore\src\PopupList\Impl\JetPopupMenuView.cs:line 2103 column 6 at System.Windows.Forms.Control.WmMouseUp(Message&, MouseButtons, Int32) at System.Windows.Forms.Control.WndProc(Message&) at System.Windows.Forms.ScrollableControl.WndProc(Message&) at System.Windows.Forms.ContainerControl.WndProc(Message&) at System.Windows.Forms.Form.WndProc(Message&) at JetBrains.ReSharper.UI.PopupList.Impl.JetPopupMenuView.WndProc(Message&) in c:\Agent\work\ReSharper-Main\src\IDECore\src\PopupList\Impl\JetPopupMenuView.cs:line 2059 column 5 at System.Windows.Forms.ControlNativeWindow.OnMessage(Message&) at System.Windows.Forms.ControlNativeWindow.WndProc(Message&) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr, Int32, IntPtr, IntPtr)