entity-framework-4

I am using Entity Framework 4.3 code first using an already existing database. There is a Users table that has the following columns: - UserID (int) - FirstName (string) - Surname (string) I have an association table called Impersonations . The Impersonations table is an association table between a user table and the same user table. A user can have a list of users. Here is the Impersonations table structure: - ImpersonateID (int primary key) - UserID (int FK to Users table's UserID column) - ImpersonatedUserID (int FK to Users table's UserID column) I have a User class with properties that I

All entity created by EF is partial class. so it is extendable. Suppose I have entity Person like partial class Person{FirstName, LastName, .....} Then I want to add a compute property Name like: partial class Person{ [DataMember] public string Name { get { return String.Format("{0} {1}", this.FirstName, this.LastName); } } partial void OnFirstNameChanged() { //..... this.ReportPropertyChanged("Name"); } partial void OnLastNameChanged() { //..... this.ReportPropertyChanged("Name"); } //.... } Then for data upate operation I got following error: The property 'Name' does not have a valid entity