WPF compile error “IDictionary must have a Key attribute”

Question

I\'ve created control styles I want to use among multiple xaml pages in my WPF app. To do this I created a Resources.xaml and added the styles there.

Then in my pag

Answer 1

Are there any other resources defined other than the merged ResourceDictionary in that Page?

For example, here's a snippet from a Window I created.

<Window x:Class="SelectionPagePrototype.SelectionPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:SelectionPagePrototype"
    Title="SelectionPage" MinHeight="600" MinWidth="800" Loaded="OnLoaded">
    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="ImageResourceDictionary.xaml" />
            </ResourceDictionary.MergedDictionaries>
            <local:QuickPickCheckedConverter x:Key="quickPickConverter" />
            <local:BoolToCaptionConverter x:Key="captionConverter" />
            <local:ProductAndImageTypeConverter x:Key="imageConverter" />
        </ResourceDictionary>
    </Window.Resources>
    <Grid> ...

The merged dictionary did not require a key, but the other resources for that Window do.