/// <summary>
        /// Chekc fil must exist in Wrok directory
        /// </summary>
        /// <param name="workDirectory"></param>
        /// <param name="WorksTodo"></param>
        private void CheckFileMustExist(Work workDirectory, List <WorkToDo> WorksTodo)
        {
            if (workDirectory != null)
            {
                foreach (var workToDo in WorksTodo)
                {
                    if (workToDo.Title.Contains("TD 7"))
                    {
                        int i = 1;
                    }

                    Work ValideWork = workDirectory.WorksChilds
                                      .Where(w => isWrokValide(w, workToDo))
                                      .FirstOrDefault();

                    if (ValideWork == null)
                    {
                        string msg = string.Format("Le travail : {0} n'existe pas", workToDo);
                        ValidateErrorMessage errorMessage = new ValidateErrorMessage(msg);
                        workDirectory.AddErrorMessage(errorMessage);
                    }
                    else
                    {
                        ValideWork.WorkToDo   = workToDo;
                        ValideWork.Validation = Enumerations.ValisationStat.Valid;
                    }
                }
            }
        }