System.Windows.Data Error: 26 : ItemTemplate and ItemTemplateSelector are ignored for items already of the ItemsControl's container type RadBreadcrumbBarItem
It turns out that this error cannot be avoided without replacing the main structure in the Breadcrumb control associated with the FileDialogs. Basically the WPF Framework warns that ItemTemplate of an ItemsControl is set and you a container is added in the ItemsControl. In this case ItemTemplate won't be applied to the added container. However, RadBreadcrumb needs this property to propagate to the children of the added container - children of the root or of the overflow item.
This can be ignored safely and it won't slow down performance.
Regards,
Martin Ivanov
Progress Telerik
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