public ulong ReadUInt64(string fieldName)
{
object token = null;
if (!ReadField(fieldName, out token))
{
return 0;
}
var value = token as long?;
if (value == null)
{
var text = token as string;
ulong number = 0;
if (text == null || !UInt64.TryParse(text, out number))
{
return 0;
}
return number;
}
if (value < 0)
{
return 0;
}
return (ulong)value;
}