internal static IAsyncResult BeginSend(SmtpConnection conn, AsyncCallback?callback, object?state)
{
MultiAsyncResult multiResult = new MultiAsyncResult(conn, callback, state);
multiResult.Enter();
IAsyncResult writeResult = conn.BeginFlush(s_onWrite, multiResult);
if (writeResult.CompletedSynchronously)
{
conn.EndFlush(writeResult);
multiResult.Leave();
}
SmtpReplyReader reader = conn.Reader !.GetNextReplyReader();
multiResult.Enter();
IAsyncResult readLinesResult = reader.BeginReadLines(s_onReadLines, multiResult);
if (readLinesResult.CompletedSynchronously)
{
LineInfo[] lines = SmtpReplyReader.EndReadLines(readLinesResult);
if (!(multiResult.Result is Exception))
{
multiResult.Result = lines;
}
multiResult.Leave();
}
multiResult.CompleteSequence();
return(multiResult);
}
private static void OnReadLines(IAsyncResult result)
{
if (!result.CompletedSynchronously)
{
MultiAsyncResult multiResult = (MultiAsyncResult)result.AsyncState !;
try
{
SmtpConnection conn = (SmtpConnection)multiResult.Context;
LineInfo[] lines = SmtpReplyReader.EndReadLines(result);
if (!(multiResult.Result is Exception))
{
multiResult.Result = lines;
}
multiResult.Leave();
}
catch (Exception e)
{
multiResult.Leave(e);
}
}
}