How do I get rid of an error about resources in a C# project

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C#

Hi CPians,

I am trying to compile a C# project with Winforms under Visual Studio that I took over. I am a former C++ developer, but no experience whatsoever with C#. I have a VERY small change to do in that project, that's why I am still giving it a try without full knowledge of it, internal tool so nothing will go in the field, etc..., just in case you might wonder why I am already trying what looks like advanced stuff with my first trial at the language.

The project should compile "out of the box", e.g. out of our source control system, but I get the following error:

A first chance exception of type 'System.Resources.MissingManifestResourceException' occurred in mscorlib.dll<br />
A first chance exception of type 'System.Resources.MissingManifestResourceException' occurred in mscorlib.dll<br />
An unhandled exception of type 'System.Resources.MissingManifestResourceException' occurred in mscorlib.dll<br />
Additional information: Für die angegebene Kultur oder die neutrale Kultur konnten keine Ressourcen gefunden werden. Stellen Sie sicher, dass XXXX.UserMessages.resources beim Kompilieren richtig in die Assembly XXX eingebettet wurde, oder dass die erforderlichen Satellitenassemblys geladen werden können und vollständig signiert sind.

The last message is in German, but basically says it could not find the resources for the given culture. I presume I have to either indicate another "culture" resource in the settings, or provide a resource for the "culture" that is currently the one set in my visual studio. Is that so ? Could someone point me out how to do that properly ? (I suppose I have an English/German conflict somewhere, since the project was built in an English speaking country and I am located in Germany - or I am missing some assemblies, but I am not sure where the resources are located in a C# project).

I could get to the programmer who checked in the project, but a. it would take a lot of time - no details here, and b. this should be compilable for anybody anyway (or that's the way I understand proper source control), so help would be appreciated. Thanks guys in advance.

What I have tried:

See above (I XXX'd the projects name).