Duplicated members on generated string resources class #493

Describe the Bug

When declaring resources with same base name but different on suffix although the static string member generated, an extra partial class declaration is produced with same name, raising CS0102 error.

For example, the following declaration on resx file:

Produces:

• A static property accessible calling Strings.MSG.InstallationFailed (static property)
• A nested partial class called InstallationFailed accessible calling Strings.MSG.InstallationFailed (static partial class)

This fires the CS012 compiler error since both declarations share the same base name.

Steps to Reproduce

1. Create a Strings.resx file on project
2. Create a resource with a common name SomeResource
3. Create another resource with same base name and an extra suffix SomeResource_Alt