Retrieve the LoaderExceptions / Bad Image Format

Today I got :

Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
While NHibernate.Mapping.Attributes wnated to do a type crawl on my assembly


System.BadImageFormatException: Próbowano załadować program w niepoprawnym formacie. (Exception from HRESULT: 0x8007000B)
While starting up a an .NET application, during core assembly load.

Both where caused by complicated type delcarations:

public class ByIdDictionary<T,ID> : DictionaryBase<T> where T : ModelBase<ID>, IUnsaved, IDictionaryElement<T>, new() where ID : struct {..}
public abstract class DictionaryBase<T> : Dictionary<object, T> where T : class, IUnsaved, IDictionaryElement<T>, new() {..}
public abstract class ModelBase<ID> : UnsavedModelBase where ID : struct {..}

I guess ByIdDictionary was to complicated :(. I found no solution… just abandoned overly complicated design.


  1. The tool that is used to „Retrieve the LoaderExceptions property” is named FUSLOGVW.exe, is located by default in C:Program FilesMicrosoft Visual Studio 8SDKv2.0Bin. I have tried that one before but it did not seem to work, today I know why. I was stupid enough to think that it does what is meat to just after starting up, and actually it does „Retrieve the LoaderExceptions property” after changing it’s default settings 🙁