An unhandled exception of type 'System.Resources.MissingManifestResourceException' oc

does anyone know how i can fix this error. i have changed the name of a form class and also tried to change the 'Resource File Name' property for the managed resource compiler tool
but everything i try is wrong, what do i need to do to remove this error?
but now i get this error:


Additional information: Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "System.Form.resources" was correctly embedded or linked into assembly "System" at compile time, or that all the satellite assemblies required are loadable and fully signed.