Error in using Local Resources

Sometimes, in an ASP.NET application, when you try to access a localized resource, you get following error message:

"System.Resources.MissingManifestResourceException: Could not find any resources appropriate for the specified culture or the neutral culture."

Reason:

This problem occurs if you use a localized resource that exists in a satellite assembly that you created by using a .resources file that has an inappropriate file name. This problem typically occurs if you manually create a satellite assembly.

To manually create a satellite assembly, you must first run the Resource File Generator (Resgen.exe), and then you must run the Assembly Linker (Al.exe). When you run Resgen.exe, if you do not specify the file name of the output file while you convert an XML-based resource format (.resx) file to a .resources file, Resgen.exe creates a .resources file that has the same file name as the input file. If the file name of your XML-based resource format file does not start with the namespace name of your application, the file name of the .resources file will not contain this namespace name either. You may run Al.exe to create a satellite assembly that contains the localized resources that exist in the .resources file. However, when you try to access a localized resource that exists in the satellite assembly, the behavior that is mentioned in the "Symptoms" section occurs.

Solution:

To work around this problem, specify the file name of the .resources file when you run Resgen.exe. While you specify the file name of the .resources file, make sure that the file name starts with the namespace name of your application. For example, run the following command at the Microsoft Visual Studio .NET command prompt to create a .resources file that has the namespace name of your application at the beginning of the file name:
Resgen strings.CultureIdentifier.resx MyApp.strings.CultureIdentifier.resources

Reference:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;839861