protected static MapiMessage GetDeliveryReceipt(MapiFolder folder, string subject, bool dsnOnly)
{
string value = DsnHumanReadableWriter.GetLocalizedSubjectPrefix(DsnFlags.Relay).ToString();
MapiTable contentsTable;
MapiTable mapiTable = contentsTable = folder.GetContentsTable();
try
{
mapiTable.SetColumns(new PropTag[]
{
PropTag.EntryId,
PropTag.Subject,
PropTag.MessageClass
});
PropValue[][] array = mapiTable.QueryRows(1000, QueryRowsFlags.None);
for (int i = 0; i <= array.GetUpperBound(0); i++)
{
if (!dsnOnly || ObjectClass.IsDsnPositive(array[i][2].Value.ToString()))
{
string text = array[i][1].Value.ToString();
if ((!text.StartsWith(value, StringComparison.OrdinalIgnoreCase) || subject.StartsWith(value, StringComparison.OrdinalIgnoreCase)) && text.EndsWith(subject, StringComparison.OrdinalIgnoreCase))
{
byte[] bytes = array[i][0].GetBytes();
return((MapiMessage)folder.OpenEntry(bytes));
}
}
}
}
finally
{
if (contentsTable != null)
{
((IDisposable)contentsTable).Dispose();
}
}
return(null);
}
