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using System;

using System.Net;

using FluentFTP;

using System.Threading;

namespace Examples {

public static class BeginGetFileSizeExample {

static ManualResetEvent m_reset = new ManualResetEvent(false);

public static void BeginGetFileSize() {

// The using statement here is OK _only_ because m_reset.WaitOne()

// causes the code to block until the async process finishes, otherwise

// the connection object would be disposed early. In practice, you

// typically would not wrap the following code with a using statement.

using (FtpClient conn = new FtpClient()) {

m_reset.Reset();

conn.Host = "localhost";

conn.Credentials = new NetworkCredential("ftptest", "ftptest");

conn.Connect();

conn.BeginGetFileSize("foobar", new AsyncCallback(BeginGetFileSizeCallback), conn);

m_reset.WaitOne();

conn.Disconnect();

}

}

static void BeginGetFileSizeCallback(IAsyncResult ar) {

FtpClient conn = ar.AsyncState as FtpClient;

try {

if (conn == null)

throw new InvalidOperationException("The FtpControlConnection object is null!");

Console.WriteLine("File size: {0}", conn.EndGetFileSize(ar));

}

catch (Exception ex) {

Console.WriteLine(ex.ToString());

}

finally {

m_reset.Set();

}

}

}

}