Changes check for force prefetch

Author: alex-kulakov

Orm/Xtensive.Orm/Orm/Internals/EntitySetState.cs

@@ -291,9 +291,6 @@ internal bool ShouldUseForcePrefetch(Guid? currentPrefetchOperation)
 
         lastManualPrefetchId = currentPrefetchOperation.Value;
       }
-      if (isDisconnected) {
-        return true;
-      }
 
       if (Session.Transaction != null) {
         switch (Session.Transaction.Outermost.IsolationLevel) {
@@ -307,6 +304,10 @@ internal bool ShouldUseForcePrefetch(Guid? currentPrefetchOperation)
         }
       }
 
+      if (isDisconnected) {
+        return true;
+      }
+
       return false;
     }