static void Trace(string msg, List<JsonPackage> packages)
{
string s = "{0}|{1}|{2}|{3}|{4}|{5}";
foreach (var p in packages)
{
System.Diagnostics.Debug.WriteLine(string.Format(s, msg, p.PackageType, p.Id, p.Location, p.LocalVersion, p.OnlineVersion));
}
}