คำถามติดแท็ก preconditions

ทำไม ReSharper ถึงตัดสินฉันสำหรับรหัสนี้ private Control GetCorrespondingInputControl(SupportedType supportedType, object settingValue) { this.ValidateCorrespondingValueType(supportedType, settingValue); switch(supportedType) { case SupportedType.String: return new TextBox { Text = (string)settingValue }; case SupportedType.DateTime: return new MonthPicker { Value = (DateTime)settingValue, ShowUpDown = true }; default: throw new ArgumentOutOfRangeException(string.Format("The supported type value, {0} has no corresponding user control …

104 c#  resharper  preconditions