Question

I have a simple class called CustomPage which inherits from Window:

public class CustomPage : Window 
{
    public string PageProperty { get; set; }
}

I want my MainWindow codebehind to inherit from CustomPage as follows:

public partial class MainWindow : CustomPage
{
    public MainWindow()
    {
        InitializeComponent();
    }
}

Unfortunately, I get the following error:

Partial declarations of 'WpfApplication1.MainWindow' must not specify different base classes

I can set x:Class to “WpfApplication1.CustomPage” in MainWindow.xaml, but then it appears I don’t have access to the UI elements defined in MainWindow.xaml…

Answer 1

public partial class MainWindow 
{
    public MainWindow()
    {
        InitializeComponent();

    }
}

public class CustomPage : Window
{
    public string PageProperty { get; set; }
}

<myWindow:CustomPage x:Class="WpfApplication4.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:myWindow="clr-namespace:WpfApplication4"
    Title="MainWindow" Height="800" Width="800">
<Grid>
</Grid>
</myWindow:CustomPage>

I hope this will help.