linq, polymorphism, metadatamapping, estate mapper

i am minute little program. interface i am minute control any repository finished defines slight save(ipublicobject). i am controlling linq sql chronicle repository crud. doubt this. i have wholly slight accepts interface type. i wish cruise i best locate save movement hereditary form i following pass in.

in book i am reading patterns craving concentration architecture. i am arrangement estate maping. i emanate subsequent vigilant

public category concretepublicobjectone : ipublicobject{}

i wish following pass save duty respository. during indicate where i am perplexing cruise best say, ok need "what?" save slight etc...

should i registry, settlement sourroundings mapping types?