c# - How do I don't validate a nested class in FluentValidation MVC -

i have viewmodel have viewmodel inside, take look

 [validator(typeof(parentvalidatorvm))] public class parentvm {         public childvm { get; set; }         public parentvm () {         this.childvm = new childvm ();      } } //rulles validation internal sealed class parentvalidatorvm : abstractvalidator<parentvm> {         public parentvalidatorvm() {         //set rules         this.rulefor(x => x.childvm).notvalidate();             //the row above example method 'notvalidate', invented            } } 

the childvm has structure properties

     [validator(typeof(childvalidatorvm))] public class childvm {        //my properties } //rulles validation internal sealed class childvalidatorvm : abstractvalidator<childvm> {         public childvalidatorvm() {         //set rules        } } 

my problem is, when call modelstate.isvalid rules child comes rules parent, not happen. know way avoid it?