public bool TryReadOffset(StringReference offsetText, int startIndex, out TimeSpan offset)
{
bool negative = (offsetText.Get(startIndex) == '-');
int hours;
if (XConvert.Int32TryParse(offsetText.Chars, startIndex + 1, 2, out hours) != ParseResult.Success)
{
offset = default(TimeSpan);
return(false);
}
int minutes = 0;
if (offsetText.Length - startIndex > 5)
{
if (XConvert.Int32TryParse(offsetText.Chars, startIndex + 3, 2, out minutes) != ParseResult.Success)
{
offset = default(TimeSpan);
return(false);
}
}
offset = TimeSpan.FromHours(hours) + TimeSpan.FromMinutes(minutes);
if (negative)
{
offset = offset.Negate();
}
return(true);
}
