从 EDM model 中查找 Principal 端和 Dependent 端

Question

I need to find all foreign keys using EDM model. I was able to pull many useful information using Systm.Data.Entity.Core.Metadata classes and methods but still not able to get Principal and Dependent from an association or relationship.
ReferentialConstraint class has public properties FromRole / ToRole , one of them is Principal and another is Dependent but I'm not sure which ones exactly.
ReferentialConstraint has private fields PrincipalEnd and DependentEnd who might help me but I woudn't like to access them via reflection. Is there a better way to figure out what end is Principal and what end is Dependent?

PS: I saw solution in this EF6 - How to determine principal/dependent sides from a NavigationProperty question but there is no proof it's 100% correct.

Answer 1

Ok, I finally found source code here

internal AssociationEndMember PrincipalEnd
{
    get { return (AssociationEndMember)FromRole; }
}

internal AssociationEndMember DependentEnd
{
    get { return (AssociationEndMember)ToRole; }
}