First, obviously, find the two types for which the cast failed and verify that they are the same type or otherwise castable. Next, if the type was just deserialized, also verify that its assembly successfully loaded in the target appdomain. If everything seems fine, check to see if the assemblies...

Say you've just installed some assemblies from a third party and now you're seeing a MissingMethodException, MissingFieldException, or TypeLoadException (during the run of an application using those assemblies). Below are the common causes. Loading failures First, check for assembly binding failures...

Microsoft's official support website is http://support.microsoft.com/ . It has all kinds of resources like product FAQs, downloads, searchable KB articles, newsgroup pointers, and ways to reach people to help with your individual needs or feedback. Unfortunately, I can't give attention to individual...

Say you're debugging your application and you see that version 1.0 of an assembly is being loaded when you thought it should be version 2.0. Where is the reference to 1.0 coming from? The easiest way to find out is to look at the Fusion log for this bind. If the version 1.0 assembly was successfully...

If a type can't be loaded for some reason during a call to Module.GetTypes(), ReflectionTypeLoadException will be thrown. Assembly.GetTypes() also throws this because it calls Module.GetTypes(). The Message for this exception is "One or more exceptions have been thrown while loading the types" or...

So...you're seeing a FileNotFoundException, FileLoadException, BadImageFormatException or you suspect an assembly loading failure? Try the steps below to start your debugging process. First, get the Message property from the exception. If the exception's InnerException property is set, get the Message...