Fix BizTalk catalog collection and diagnostics

src/BizTalkApplicationCatalog/Infrastructure/ConsoleFileLogger.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Globalization;
 using System.IO;
+using System.Management;
+using System.Reflection;
 using System.Text;
 
 namespace BizTalkApplicationCatalog.Infrastructure
@@ -19,8 +21,57 @@ namespace BizTalkApplicationCatalog.Infrastructure
         }
 
         public void Info(string message) { Write("INFO", message); }
+        public void Detail(string message) { Write("DETAIL", message); }
         public void Warning(string message) { Write("WARNUNG", message); }
         public void Error(string message) { Write("FEHLER", message); }
+
+        /// <summary>
+        /// Schreibt die vollständige Ausnahmekette einschließlich HRESULT,
+        /// WMI-Status und Stacktrace auf Konsole und in die Logdatei.
+        /// </summary>
+        public void Exception(string context, Exception exception)
+        {
+            if (exception == null)
+            {
+                Error(context + ": Unbekannter Fehler ohne Ausnahmeobjekt.");
+                return;
+            }
+
+            Error(context + ": " + exception.Message);
+            var current = exception;
+            var depth = 0;
+            while (current != null)
+            {
+                Detail(string.Format(
+                    CultureInfo.InvariantCulture,
+                    "Ausnahme[{0}]: Typ={1}; HRESULT=0x{2:X8}; Meldung={3}",
+                    depth,
+                    current.GetType().FullName,
+                    current.HResult,
+                    current.Message));
+
+                var managementException = current as ManagementException;
+                if (managementException != null)
+                {
+                    Detail("WMI-Status: " + managementException.ErrorCode);
+                }
+
+                if (!string.IsNullOrWhiteSpace(current.StackTrace))
+                {
+                    Detail("Stacktrace[" + depth + "]:" + Environment.NewLine
+                        + current.StackTrace);
+                }
+
+                // Reflection kapselt Providerfehler häufig in TargetInvocationException.
+                // Die innere Ausnahme wird deshalb ausdrücklich mit ausgegeben.
+                var targetInvocation = current as TargetInvocationException;
+                current = targetInvocation != null && targetInvocation.InnerException != null
+                    ? targetInvocation.InnerException
+                    : current.InnerException;
+                depth++;
+            }
+        }
+
         public void Dispose() { writer.Dispose(); }
 
         private void Write(string level, string message)

src/BizTalkApplicationCatalog/Infrastructure/SafeCollector.cs

@@ -52,9 +52,11 @@ namespace BizTalkApplicationCatalog.Infrastructure
                     Severity = required ? "Fehler" : "Warnung",
                     Area = name,
                     Message = "Datenerfassung fehlgeschlagen: " + exception.Message,
-                    RecommendedAction = "Logdatei, WMI-Provider und Leseberechtigungen prüfen."
+                    RecommendedAction =
+                        "Logdatei, WMI-Provider, ExplorerOM-Installation "
+                        + "und BizTalk-Leseberechtigungen prüfen."
                 });
-                logger.Error(name + ": " + exception.Message);
+                logger.Exception(name, exception);
             }
         }
     }