sql - How to tell if a property of an EntityObject is a primary key or foreign key? -

suppose have class generated entity framework called student.

student has following properties:

id int, name, string age, int teacherid int 

suppose further id refers primary key in sql identifies student student object refers , teacherid foreign key tells student's teacher is.

suppose want write function takes any entityobject (such one) parameter , returns information properties primary keys , foreign keys.

how can this?

if not appropriate, how can entity framework tell me properties primary , foreign keys?

for now, let's not take consideration composite key fields.

looking on code autogenerated, can see primitive properties in generated class have several attributes, , among these edmscalarpropertyattribute has boolean entitykeyproperty seems indicate whether or not property key.

how read values of attributes described in article here: http://msdn.microsoft.com/en-us/library/71s1zwct.aspx

i'll bet can find consistent pattern how foreign keys handled well!