Comprehensive validation extension

When writing extensions for Builder Fluent Validation, I came up with the idea of ​​doing a more complex validation and then plugging it in with client validation. I have successfully created extensions that check one property against another and so on. What I am struggling with is multi-field validation:

Extension method as at https://fluentvalidation.codeplex.com/wikipage?title=Custom&referringTitle=Documentation

public static IRuleBuilderOptions<T, TProperty> Required<T, TProperty>(this IRuleBuilder<T, TProperty> ruleBuilder, Action<MyRuleBuilder<T>> configurator)
    {
        MyRuleBuilder<T> builder = new MyRuleBuilder<T>();

        configurator(builder);

        return ruleBuilder.SetValidator(new MyValidator<T>(builder));
    }

      

        
        
        
      

    

MyRuleBuilder class that allows you to freely add rules:

public class MyRuleBuilder<T>
{
    public Dictionary<string, object> Rules = new Dictionary<string,object>();

    public MyRuleBuilder<T> If(Expression<Func<T, object>> exp, object value)
    {
        Rules.Add(exp.GetMember().Name, value);

        return this;
    }
}

      

        
        
        
      

    

Then the rules for validating the view model and model view are as follows:

public class TestViewModel
{
    public bool DeviceReadAccess { get; set; }
    public string DeviceReadWriteAccess { get; set; }
    public int DeviceEncrypted { get ; set; }
}

RuleFor(x => x.HasAgreedToTerms)
    .Required(builder => builder
        .If(x => x.DeviceReadAccess, true)
        .If(x => x.DeviceReadWriteAccess, "yes")
        .If(x => x.DeviceEncrypted, 1 ));

      

        
        
        
      

    

Problem:

This works great, but I don't like the "If" function. it does not apply the value of the selected property type. Example:

RuleFor(x => x.HasAgreedToTerms)
    .Required(builder => builder
        .If(x => x.DeviceReadAccess, true) // I would like the value to be enforced to bool
        .If(x => x.DeviceReadWriteAccess, "yes") // I would like the value to be enforced to string

// Ideally something like 

// public MyRuleBuilder<T> If(Expression<Func<T, U>> exp, U value) but unfortunately U cannot be automatically inferred

      

        
        
        
      

    

Is this possible with this architecture or should I use a different approach?

Thank.