will RegularExpressionAttribute and other validators on Automatic properties work?

Question

I'm using xsd2code for generating classes from schema. how ever I'm suspicious that auto properties can validate values or not?

because if I enable AutomaticProperties in xsd2code here is what I get for member with Regex restriction.

[System.Xml.Serialization.XmlAttributeAttribute(DataType="token", AttributeName="color")]
[System.ComponentModel.DataAnnotations.RegularExpressionAttribute("#[\\dA-F]{6}([\\dA-F][\\dA-F])?")]
public string Color { get; set; }

And when AutomaticProperties is disabled

[System.Xml.Serialization.XmlAttributeAttribute(DataType="token", AttributeName="color")]
[System.ComponentModel.DataAnnotations.RegularExpressionAttribute("#[\\dA-F]{6}([\\dA-F][\\dA-F])?")]
public string Color
{
    get
    {
        return this._color;
    }
    set
    {
        System.ComponentModel.DataAnnotations.ValidationContext validatorPropContext = new System.ComponentModel.DataAnnotations.ValidationContext(this, null, null);
        validatorPropContext.MemberName = "Color";
        Validator.ValidateProperty(value, validatorPropContext);
        this._color = value;
    }
}

It seems these are not equivalent. so I think its a bug in xsd2code or maybe I'm misunderstanding something. whats the purpose of second generated code?

I thought RegularExpressionAttribute would also validate automatic properties too.