How to create Model

Hi

  I have properties like this . I want MemberId,RegId,SSN No to be Unique . I am using Entity Framework Code First Approach. MemberId will be Primary Key.

I am using EF 5. In EF 6.1 i thibk Unique Oprion is available. I want to do in EF5.

    Public String MemberId

    Public String RegId

    Public Int SSN No

    Public String Name

Thanks