For everybody who will read this threat:

I've fixed it by myself: I ran the Upgrade Infragistics Assistent one more time over the whole solution. Afterwards it worked properly.

So, may be the versions weren't all the same. But the error message is very crazy.

Hello Andrew,

it's getting worse.

I've removed all refs to the shared dll and removed the ribbon at all.

When I insert <igRibbon:XamRibbon />  to Xaml I'm receiving follow error in the WPF-Editor:

'Infragistics.Windows.Ribbon.RibbonBrushKeys.ButtonCheckedHottrackBorderFillKey' StaticExtension value cannot be resolved to an enumeration, static field, or static property. 

Do you have any explanation for that?

I don't know what to do.

Hello Andrew,

I've tested it and it worked as I said before. But now I moved the class into a own shared dll and I've got two error messages:

1. The specified value cannot be assigned to the collection. The following type was expected: "RibbonGroup". 
2. The local property "Caption" can only be applied to types that are derived from "RibbonGroup". 

But the SearchRibbonGroup inheriance from RibbonGroup as you'll find in my source code:

public class SearchRibbonGroup : RibbonGroup
    {
        public event RoutedEventHandler SearchStarted;

 public string SearchText { get { return te.Text; } set { te.Text = value; } }
        public string EditorCaption { get { return te.Caption; } set { te.Caption = value; } }
        public string ButtonCaption { get { return b.Caption; } set { b.Caption = value; } }

 
        private TextEditorTool te;
        private ButtonTool b;
 
        public SearchRibbonGroup()
            : base()
        {
            te = new TextEditorTool();
            te.AcceptsReturn = false;
            te.AcceptsTab = false;
            te.KeyDown += te_KeyDown;
            AddChild(te);
 
            b = new ButtonTool();
            b.Click += b_Click;
            AddChild(b);
 
            this.Closed += SearchRibbonGroup_Closed;
        }
 
        void SearchRibbonGroup_Closed(object sender, RoutedEventArgs e)
        {
            Closed -= SearchRibbonGroup_Closed;
            te.KeyDown -= te_KeyDown;
            b.Click -= b_Click;
        }
 
        void b_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            if (SearchStarted != null)
            {
                SearchStarted(this, e);
            }
        }
 
        void te_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Tab || e.Key == Key.Enter)
            {
                b_Click(sender, new RoutedEventArgs(e.RoutedEvent));
            }
        }

And I'm using it in that way:

<ig:RibbonTabItem Header="Common.Item">
                <igView:SearchRibbonGroup Caption="Selection" ButtonCaption="Search"  EditorCaption="ItemNo" SearchStarted="ItemSearch_Click" />

ig:RibbonTabItem>

What do I wrong?

What do I have to do to get rid of these error messages?

I can compile the whole solution - it is only a error in the WPF-Editor but it's getting anoying when I use the SearchRibbonGroup often at the same window.

Thanks again!

Edit: More detail infos