MEF Debugging - Spit out values

MEFOutput.cs

            try
            {

                // Just try to check whether the actual service instance can be created. 
                var svc = container.GetExportedValue<AppStoreServiceImpl>();
                Debug.Assert(
                    svc != null,
                    "container.GetExportedValue<AppStoreServiceImpl>() != null");
            }
            catch (CompositionException ce)
            {
                Func<string, string> getVal = s =>
                                                  {
                                                      try
                                                      {
                                                          return container.GetExportedValueOrDefault<string>(s);
                                                      }
                                                      catch (Exception ex)
                                                      {
                                                          return ex.GetType().Name + " " + ex.Message;
                                                      }
                                                  };

                var sb = new StringBuilder();
                sb.AppendLine(ce.GetFullDetail());

                sb.AppendLine("ImportDefinitions");
                container.Catalog.Parts.ToList().ForEach(c => c.ImportDefinitions.ToList().ForEach(ed => sb.AppendLine("IMPORT" + "\t" + ed.ContractName + "\t" + c.ToString() + "\t" + getVal(ed.ContractName))));
                sb.AppendLine("ExportDefinitions");
                container.Catalog.Parts.ToList().ForEach(c => c.ExportDefinitions.ToList().ForEach(ed => sb.AppendLine("EXPORT" + "\t" + ed.ContractName + "\t" + c.ToString())));
                
                throw new NotImplementedException(sb.ToString());
            }