The tag 'RadTabControl' does not exist in XML namespace 'clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation'

[Frustrated Dev]

Hello,

I am attempting to create the most basic page with a tab control. However, I am getting an error that says:
"The tag 'RadTabControl' does not exist in XML namespace 'clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation'"

My XAML is pretty simple. It looks like the following:

<UserControl x:Class="MyProject.MyPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:navigation="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"
    xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"
    xmlns:gridview="clr-namespace:Telerik.Windows.Controls.GridView;assembly=Telerik.Windows.Controls.GridView">
    <Grid x:Name="LayoutRoot" Background="Silver">
        <navigation:RadTabControl x:Name="mainTabControl" />
    </Grid>
</UserControl>

What am I doing wrong?

[Bobi]

Hi Frustrated Dev,

Please find attached a sample project.
Verify that you have referenced  under the Referense folder the following assemblies :
"Telerik.Windows.Controls.dll"
"Telerik.Windows.Controls.Navigation.dll"
"Telerik.Windows.Controls.GridView.dll"

If the problem still exist please let us know.
We need to know the version of your assemblies as well.

Greetings,
Bobi
the Telerik team

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