Deserialization works only in debug mode

Question

When I try to deserialize an XML document (defined via File-Connection) it works fine in debug mode but I get an error in non-debug-mode. What's the problem here?
Error: 2011-12-29 19:31:40.25
Code: 0x00000001
Source: Read data from SAP
Description: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: There is an error in X
ML document (0, 0). ---> System.TypeInitializationException: The type initializer for 'Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1' threw an exception
. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1..cctor()
--- End of inner exception stack trace ---
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1..ctor()
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializerContract.get_Reader()
at System.Xml.Serialization.TempAssembly.InvokeReader(XmlMapping mapping, XmlReader xmlReader, XmlDeserializationEvents events, String encodingStyle)
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
--- End of inner exception stack trace ---
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
at System.Xml.Serialization.XmlSerializer.Deserialize(TextReader textReader)

Answer 1

Yes, there is a potential for a bug. Thus, feel free to log it in
MS Connect.
You need to deploy it to the GAC, too. I will better point you to a blog post that covers this: http://www.hoekstra.co.uk/index.php/software-mainmenu-36/ssis-mainmenu-75/73-create-and-use-a-c-assembly-for-ssis.html?start=1
I suggest when you go live you create a script that will take care of all, but it is not too too laborious.
Arthur My Blog
Are you 100% sure? Because I can see that SSIS seeks for the dll in ...DTS/binn. So I see no need to pollute the GAC with this dll.
My dll is not deployed into the GAC and when I remove it, it will no longer work. I think it works in DTS/binn because the DTExec.exe is located there?
LOG: This bind starts in default load context.
LOG: Using application configuration file: c:\Program Files\Microsoft SQL Server\100\DTS\binn\DTExec.exe.Config
LOG: Using machine configuration file from c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///c:/Program Files/Microsoft SQL Server/100/DTS/binn/ClassLibrary1.DLL.
LOG: Attempting download of new URL file:///c:/Program Files/Microsoft SQL Server/100/DTS/binn/ClassLibrary1/ClassLibrary1.DLL.
LOG: Attempting download of new URL file:///c:/Program Files/Microsoft SQL Server/100/DTS/binn/ClassLibrary1.EXE.
LOG: Attempting download of new URL file:///c:/Program Files/Microsoft SQL Server/100/DTS/binn/ClassLibrary1/ClassLibrary1.EXE.