Im getting the error"specified type member FullName is not supported in LINQ to Entities" when using select d.FullName, is it because it is not part of the table?

How do I fix this?

Thanks

USER CLASS

```
public partial class tblUser
{
    public tblUser()
    {
        this.Equipment = new HashSet<tblEquipment>();
    }

    public int ID { get; set; }
    public string Forename { get; set; }
    public string Surname { get; set; }

    public string FullName { get { return Forename + " " + Surname; } }

```

QUERY WITH ERROR

```
string[] arrUsers = (from d in db.tblUsers select d.FullName).ToArray();

```