WPF: RibbonWindow

Question

Hallo dear Team,

 

I followed the same instructions of the link:

 

https://www.c-sharpcorner.com/UploadFile/0b73e1/ribbon-control-in-wpf-4-5/

 

as first: I change the tags in XAML from Window to RibbonWindow

 

<RibbonWindow x:Class="WPFTextverarbeitung.MainWindow" /RibbonWindow>

 

as second: obviously I change in MainWindow.cs as it follows:

 

using System.Windows.Controls.Ribbon;

namespace WPFTextverarbeitung

{

public partial class MainWindow : RibbonWindow

{

public MainWindow()

{

InitializeComponent();

}

}

}

 

the MainWindow will show an error "Partial Declaration of MainWindow must not specify different base classes"

 

It's very strange since I change the tags in XAML and I set the new assembly using as you see above.

 

How shall I proceed?

 

I've still deleted the project and made a new one to try and check if the error away is but at the end I always get the same error message.

 

Thank you in advance for your help.

Best regards

Giovanni