private static TiffFieldInfo createAnonFieldInfo(TiffTag tag, TiffType field_type)
{
TiffFieldInfo fld = new TiffFieldInfo(tag, TiffFieldInfo.Variable2,
TiffFieldInfo.Variable2, field_type, FieldBit.Custom, true, true, null);
// note that this name is a special sign to Close() and
// setupFieldInfo() to free the field
fld.Name = string.Format(CultureInfo.InvariantCulture, "Tag {0}", tag);
return fld;
}