Look at the source code for WP7DataCollector.GetAppAttribute() in the Microsoft Silverlight Analytics Framework. GetAppAttribute("Title") will do it.
/// <summary>
/// Gets an attribute from the Windows Phone App Manifest App element
/// </summary>
/// <param name="attributeName">the attribute name</param>
/// <returns>the attribute value</returns>
private static string GetAppAttribute(string attributeName)
{
string appManifestName = "WMAppManifest.xml";
string appNodeName = "App";
var settings = new XmlReaderSettings();
settings.XmlResolver = new XmlXapResolver();
using (XmlReader rdr = XmlReader.Create(appManifestName, settings))
{
rdr.ReadToDescendant(appNodeName);
if (!rdr.IsStartElement())
{
throw new System.FormatException(appManifestName + " is missing " + appNodeName);
}
return rdr.GetAttribute(attributeName);
}
}