return list with anonymous type in entity framework

How i can return list with anonymous type, because with this code i get

"The type or namespace name 'T' could not be found (are you missing a using directive or an assembly reference?)"

i need only return IdMember and UserName, thanks

    public static List<T> GetMembersItems(string ProjectGuid)
    {
        using (PMEntities context = new PMEntities("name=PMEntities"))
        {
            var items = context.Knowledge_Project_Members.Include("Knowledge_Project").Include("Profile_Information")
                        .Where(p => p.Knowledge_Project.Guid == ProjectGuid)
                        .Select(row => new { IdMember = row.IdMember, UserName = row.Profile_Information.UserName });

            return items.ToList();
        }
    }