AssessmentAnywhere.Services.Assessments.Assessment.SetCandidateNames C# (CSharp) Method

        public void SetCandidateNames(Guid id, string surname, string forenames)
        {
            if (string.IsNullOrWhiteSpace(surname))
            {
                throw new ArgumentException("Surname must have a value.", "surname");
            }

            if (string.IsNullOrWhiteSpace(forenames))
            {
                throw new ArgumentException("Forenames must have a value.", "forenames");
            }

            var existingResult = this.results.Single(r => r.Id == id);
            var newResult = new AssessmentResult(id, surname, forenames, existingResult.Result);

            if (this.results.Where(r => r.Id != existingResult.Id).Any(r => r.Surname == surname && r.Forenames == forenames))
            {
                throw new UniqueConstraintException(string.Format("A candidate with name \"{0}, {1}\" alread exists.", surname, forenames));
            }

            this.results.Remove(existingResult);
            this.results.Add(newResult);
        }