OpenWriteCompletedEventArgs.Result Property

You should check the Error and Cancelled properties before using the stream returned by this property. If the Error property's value is an Exception object or the Cancelled property's value is true, the asynchronous operation did not complete correctly and the Result property's value will not be valid.

The following code example uses the stream returned by this property.

    private static void OpenWriteCallback2 (Object sender, OpenWriteCompletedEventArgs e)
    {
        Stream body = null;
        StreamWriter s = null;

        try
        {
            body = (Stream)e.Result;
            s = new StreamWriter (body);
            s.AutoFlush = true;
            s.Write ("This is content data to be sent to the server.");
        }
        finally
        {
            if (s != null)
            {
                s.Close ();
            }

            if (body != null)
            {
                body.Close ();
            }
        }
    }

.NET Framework

.NET Framework Client Profile

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference