protected override void ClearFast()
{
_bits = 0;
_CacheControl = StringValues.Empty;
_Connection = StringValues.Empty;
_Date = StringValues.Empty;
_KeepAlive = StringValues.Empty;
_Pragma = StringValues.Empty;
_Trailer = StringValues.Empty;
_TransferEncoding = StringValues.Empty;
_Upgrade = StringValues.Empty;
_Via = StringValues.Empty;
_Warning = StringValues.Empty;
_Allow = StringValues.Empty;
_ContentLength = StringValues.Empty;
_ContentType = StringValues.Empty;
_ContentEncoding = StringValues.Empty;
_ContentLanguage = StringValues.Empty;
_ContentLocation = StringValues.Empty;
_ContentMD5 = StringValues.Empty;
_ContentRange = StringValues.Empty;
_Expires = StringValues.Empty;
_LastModified = StringValues.Empty;
_AcceptRanges = StringValues.Empty;
_Age = StringValues.Empty;
_ETag = StringValues.Empty;
_Location = StringValues.Empty;
_ProxyAutheticate = StringValues.Empty;
_RetryAfter = StringValues.Empty;
_Server = StringValues.Empty;
_SetCookie = StringValues.Empty;
_Vary = StringValues.Empty;
_WWWAuthenticate = StringValues.Empty;
MaybeUnknown?.Clear();
}