System.Net.Http.Headers.RangeConditionHeaderValue public class RangeConditionHeaderValue : ICloneable Represents a header value which can either be a date/time or an entity-tag value. Documentation public DateTimeOffset? Date { get; } public EntityTagHeaderValue EntityTag { get; } public RangeConditionHeaderValue(DateTimeOffset date) public RangeConditionHeaderValue(EntityTagHeaderValue entityTag) public RangeConditionHeaderValue(string entityTag) public static RangeConditionHeaderValue Parse(string input) public static bool TryParse(string input, out RangeConditionHeaderValue parsedValue)