.NET 4.0 - CultureNotFoundException

I have migrated my ASP.NET MVC 2 project to VS 2010 + .NET 4.0. Now when i start the application i get a lot of "CultureNotFoundException" in IntelliTrace and Output/Gebug window :

A first chance exception of type 'System.Globalization.CultureNotFoundException' occurred in mscorlib.dll

I know what "A first chance exception" means, but when i try to debug(added "CultureNotFoundException" into Bebug/Exceptions[Thrown]) why ex. is thrown i got this detailed exception text:

System.Globalization.CultureNotFoundException occurred Message=Culture is not supported. Parameter name: name designer is an invalid culture identifier. Source=mscorlib ParamName=name InvalidCultureName=designer StackTrace: at System.Globalization.CultureInfo..ctor(String name, Boolean useUserOverride) InnerException:

I wonder why .NET is trying to create CultureInfo with name "designer"?

Isn't it bug?


For other people that have this problem, this is usually an exception that is ignored.

Go to the Debug menu -> Exceptions... and ensure that you have everything unchecked for the Exception list.

I had a similar issue with the CultureName "UserCache". To resolve this I deleted all the folders from in here:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files

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