public static decimal?Min(this OneItemSpecificEnumerable <decimal?> source) { if (source.IsDefaultValue()) { throw CommonImplementation.Uninitialized(nameof(source)); } return(source.Item); }
public static float Average(this OneItemSpecificEnumerable <float> source) { if (source.IsDefaultValue()) { throw CommonImplementation.Uninitialized(nameof(source)); } return(source.Item); }
public bool SequenceEqual(OneItemSpecificEnumerable <TItem> second) { if (IsDefaultValue()) { throw CommonImplementation.Uninitialized("first"); } if (second.IsDefaultValue()) { throw CommonImplementation.Uninitialized(nameof(second)); } return(EqualityComparer <TItem> .Default.Equals(default(TItem), second.Item)); }