C# - Display File Type Icon In Silverlight?

I have this situation where I need to display a bunch of files pulled from a Sharepoint site in a Silverlight application. I use a WCF service to get the data from the Sharepoint site.

So what I have is file names with their corresponding extensions. What I need to do is, display the files in the Silverlight application with their corresponding file type icon and file name. The following is the Heirarchical data template I use to display the files in the Silverlight application.

<sdk:HierarchicalDataTemplate x:Key="FileTemplate">
<StackPanel Orientation="Vertical">
<Image x:Name="imgFile" Source="{Binding FileImage}" Height="35" ></Image>
<TextBlock x:Name="txtFile" Text="{Binding FileName}"></TextBlock>
</StackPanel>
</sdk:HierarchicalDataTemplate>

Where FileImage and FileName are strings.

PS: The reason I don't have file type and size is because I using Sharepoint web services and XMLReader to get the information about the files.