Revit.Plugln/FWindSoft/FWindSoft.Wpf/Themes/CommonStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:controls="clr-namespace:FWindSoft.Wpf.Controls"
                    xmlns:wpf="clr-namespace:FWindSoft.Wpf">
    <FontFamily x:Key="{x:Static wpf:FontsUtil.AwesomeKey}">pack://application:,,,/FWindSoft.Wpf;component/Resources/#FontAwesome</FontFamily>

   
</ResourceDictionary>