protected override void OnMapping(MappingBuilder builder)
{
builder.Entity<Assignment>()
.PropertyName(_ => _.Parent_id, "ParentAssignment_id")
.PropertyValue(_ => _.AssignmentType, "AssignmentTypeCode",
(string code) => (AssignmentType)Enum.Parse(typeof(AssignmentType), code))
;
//.Create(reader=>new Assignment(){Assignment_id = (int)reader["Assignment_id"]})
//.IgnoreProperty(_ => _.Title)
//.IgnoreProperty(_ => _.Parent_id)
//.IgnoreProperty(_ => _.AssignmentType)
}
