private static MapiStream OpenAndLockStream(MapiFolder oofHistoryFolder, byte[] initialBytes, long hashCode, out bool isNew)
{
MapiStream mapiStream = null;
isNew = false;
OpenPropertyFlags openPropertyFlags = OpenPropertyFlags.Modify | OpenPropertyFlags.DeferredErrors;
try
{
mapiStream = oofHistoryFolder.OpenStream(PropTag.OofHistory, openPropertyFlags);
OofHistory.LockStreamWithRetry(mapiStream, hashCode);
}
catch (MapiExceptionNotFound)
{
if (mapiStream != null)
{
mapiStream.Dispose();
mapiStream = null;
}
OofHistory.Tracer.TraceDebug(hashCode, "OOF history property does not exist, trying to open with create flag.");
openPropertyFlags |= OpenPropertyFlags.Create;
mapiStream = oofHistoryFolder.OpenStream(PropTag.OofHistory, openPropertyFlags);
OofHistory.LockStreamWithRetry(mapiStream, hashCode);
OofHistory.ResetOofHistoryProperty(mapiStream, initialBytes, hashCode);
isNew = true;
}
return(mapiStream);
}