create custom validator-fluentvalidation

Question

I would like to create fluentValidation cutomer validator, So that I can use this custom validator in coming projects.

 

My class is and xxxxxxxxx-want to get custom method after implementation of code (I tried but not giving +ve output-see my following code)

namespace  ratenamespace
{
public class ratecmd
{
[NoODataProcedureParameter]
public int? ProductId { get; set; }

[NoODataProcedureParameter]
public int? PlaceId { get; set; }

[NoODataProcedureParameter]
public int? Rate { get; set; }
}

public class ratecmdValidator : AbstractValidator
    {
        public ratecmd()
        {
            RuleFor(x => x.Rate).xxxxxxxxx;
}}}

I have created seperate class for custom validator like this:

public class myValidator : PropertyValidator
    {
        public  myValidator()
            : base("{PropertyName} must be greater than zero and not null.") { }

        protected override bool IsValid(PropertyValidatorContext context)
        {
            int? rate = context.PropertyValue as int?;
            if (rate != null && rate <= 0)
            {
                return false;
            }
            return true;
        }
    }