How to reuse icons (xaml-paths) in a large project?

Question

I am part of the development of a larger-scale Silverlight 4 project, where we will have a set of symbols that should be used across different parts of the GUI (see the exam

Answer 1

<Style x:Key="MyIcon" TargetType="ContentControl">
        <Setter Property="ContentTemplate">
            <Setter.Value>
                <DataTemplate>
                    <Path Stretch="Fill" Fill="Red" Data="F1 M 24,13C 27.1521,13 29.9945,14.3258 32,16.4501L 32,11L 35,14L 35,22L 27,22L 24,19L 29.5903,19C 28.217,17.4656 26.2212,16.5 24,16.5C 20.1969,16.5 17.055,19.3306 16.5661,23L 13.0448,23C 13.5501,17.3935 18.262,13 24,13 Z M 24,31.5C 27.8031,31.5 30.945,28.6694 31.4339,25L 34.9552,25C 34.4499,30.6065 29.738,35 24,35C 20.8479,35 18.0055,33.6742 16,31.5499L 16,37L 13,34L 13,26L 21,26L 24,29L 18.4097,29C 19.783,30.5344 21.7787,31.5 24,31.5 Z "/>
                </DataTemplate>
            </Setter.Value>
        </Setter>
    </Style>

And then use style with contentcontrol type (or derivates):

<ContentControl Style="{StaticResource MyIcon}" Width="20" Height="20" Grid.Row="0"/>

All styles can be inside some resource dictionary: This is quite informative article: http://blogs.infosupport.com/tips-for-effective-usage-of-resource-dictionaries-in-silverlight-and-wpf/