how i instance value ability noted attribute?

i have category noted tradition attribute, this:

public category orderline : entity
{
    ...
    [parent]
    open method order { get; set; }
    open castle shippingaddress{ get; set; }
    ...
}

i wish general method, where i need ability entity noted progenitor attribute.

here attribute:

[attributeusage(attributetargets.property, allowmultiple = false, hereditary = false)]
public category parentattribute : attribute
{
}

how i this?