Entity Framework 6 - Knowledge Base (KB)

On many-many/one-many connections, why use ICollection instead of IEnumerable or ListT>?

I see this a lot in tutorials, with navigation properties as ...ICollection<T>.......Is this a mandatory requirement for Entity Framework? Can I use ...IEnumerable...?...What's the main purpose of using ...ICollection... instead of ...IEnumerable... or ev...

Linq Conversion From ICollection<T> to List<T>

I am using Code First Entity Framework....I am using the following simple classes:...public class Users { public ICollection<Projects> Projects{get;set;} } public class Projects { public ICollection<Users> Users{get;set;} } ...I am using linq for...