Subsonic ActiveRecord CreatedBy, ModifiedBy, etc

On ActiveRecord.tt

public void Update(IDataProvider provider){
...
}

removed the following block codes:

if(tbl.Columns.Any(x=>x.Name=="ModifiedBy")){
   if(String.IsNullOrEmpty(this.ModifiedBy))
       this.ModifiedBy=Environment.UserName;
}

if(tbl.Columns.Any(x=>x.Name=="ModifiedOn")){
    this.ModifiedOn=DateTime.Now;
}

after that the method should look like the one below:

public void Update(IDataProvider provider) {
    if(this._dirtyColumns.Count>0)
        _repo.Update(this,provider);
    OnSaved();
}

Similarly remove the rest of the Update() methods. Do the same with the Add() methods.