Why does GetManifestResourceStream returns null while the resource name exists when calling GetManifestResourceNames?

Remember the following issues…

Step 1. Build action set to embedded resource see

C#’s GetManifestResourceStream Gotcha

Step 2. Use namespace.resourcename see GetManifestResourceStream() returns null ?

Actually, this method returns null if a private resource in another assembly is accessed and the caller does not have ReflectionPermission with the ReflectionPermissionFlag.MemberAccess flag.