HandyControl/Net40/HandyControlDemo_Net40/Resources/Themes/Basic/Converters.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:converter="clr-namespace:HandyControlDemo.Tools.Converter">

    <converter:StringRepeatConverter x:Key="StringRepeatConverter"/>

</ResourceDictionary>