WindowsForms LoaderException

[David Smith]

My app has a base Form class, called FunctionForm, from which all forms inherit.
This worked fine last week, when I was using VS.NET 2005 Pro but this week,
while using VS.NET 2005 Team System Developer, I get the following while
working in the designer. The form compiles and runs fine, but I can't design
it. Firstly, is the stack trace the LoaderExceptions property? Secondly,
how do I approach a work around?

Unable to load one or more of the requested types. Retrieve the LoaderExceptions
property for more information.
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at System.Reflection.Module.GetTypesInternal(StackCrawlMark& stackMark)
at System.Reflection.Assembly.GetTypes()
at Microsoft.VisualStudio.Shell.Design.AssemblyObsoleteEventArgs..ctor(Assembly
assembly)
at Microsoft.VisualStudio.Design.VSDynamicTypeService.ReloadAssemblyIfChanged(String
codeBase)
at Microsoft.VisualStudio.Design.VSDynamicTypeService.CreateDynamicAssembly(String
codeBase)
at Microsoft.VisualStudio.Design.VSTypeResolutionService.AssemblyEntry.get_Assembly()
at Microsoft.VisualStudio.Design.VSTypeResolutionService.AssemblyEntry.Search(String
fullName, String typeName, Boolean ignoreTypeCase, Assembly& assembly, String
description)
at Microsoft.VisualStudio.Design.VSTypeResolutionService.SearchProjectEntries(AssemblyName
assemblyName, String typeName, Boolean ignoreTypeCase, Assembly& assembly)
at Microsoft.VisualStudio.Design.VSTypeResolutionService.GetType(String typeName,
Boolean throwOnError, Boolean ignoreCase, ReferenceType refType)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.AggregateTypeResolutionService.GetType(String
name, Boolean throwOnError, Boolean ignoreCase)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.AggregateTypeResolutionService.GetType(String
name)
at System.ComponentModel.Design.DesignerHost.System.ComponentModel.Design.IDesignerHost.GetType(String
typeName)
at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.EnsureDocument(IDesignerSerializationManager
manager)
at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager
manager)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager
serializationManager)
at System.ComponentModel.Design.Serialization.BasicDesignerLoader.BeginLoad(IDesignerLoaderHost
host)

 

[Guest]

I think you mean the bug somebody already found a work-around for in the
"User Control Designer Errors is [sic] VS2005 RC1" thread.

Change your AssemblyInfo.cs files in the UserControls DLLs as follows:
[assembly: AssemblyVersion("5.5.5")]

Where 5.5.5 is any hard-coded version number. The problem was the .* in it
causing the UserControl to have an auto-generated version that's different
than what your other DLL is expecting. As soon as you recompile it with
changes or something, you get the Unable to Load error.

BTW - Notice I called it a BUG. I truly believe it's a bug. There's a
rational explanation for what it's doing, but it is bound to cause a little
frustration for a lot of people.

Let me know if it works.