its not displaying at design mode and run time mode
CodeBehind
RadRibbonTab r1 = new RadRibbonTab();
r1.Header = "Home";
RadRibbonGroup rg = new RadRibbonGroup();
rg.Header = "RibbonGroup";
RadRibbonButton rbbtn = new RadRibbonButton();
rbbtn.Content = "Save";
rg.Items.Add(rbbtn);
r1.Items.Add(rg);
PhoenixRibbonBar.Items.Add(r1);
Designmode
<telerik:RadRibbonView ApplicationButtonImageSource="AppIcon.png" Title="Microsoft Word">
<telerik:RadRibbonTab Header="Home">
<telerik:RadRibbonGroup Header="Clipboard">
<telerik:RadRibbonSplitButton Text="Paste" LargeImage="paste.png" Size="Large"
telerik:ScreenTip.Title="Paste(Ctrl+V)"
telerik:ScreenTip.Description="Paste the contents the Clipboard.">
<telerik:RadRibbonSplitButton.DropDownContent>
<telerik:RadContextMenu BorderThickness="0">
<telerik:RadMenuItem Header="Paste" />
<telerik:RadMenuItem Header="Paste Form" />
</telerik:RadContextMenu>
</telerik:RadRibbonSplitButton.DropDownContent>
</telerik:RadRibbonSplitButton>
</telerik:RadRibbonGroup>
</telerik:RadRibbonTab>
<telerik:RadRibbonTab Header="View" />
</telerik:RadRibbonView>