public static RatingViewCriterion ToRatingViewCriterion(this string criterion) => criterionMapping.GetOrDefault((criterion != null ? criterion : string.Empty).ToUpper(), RatingViewCriterion.None);
public static RatingViewCriterion ToRatingViewCriterion(this string criterion) => criterionMapping.GetOrDefault((criterion != null ? criterion : string.Empty).ToUpper(), RatingViewCriterion.None);