system.net

SSL can either be "explicit" or "implicit" as explained by this link: http://help.globalscape.com/help/secureserver2/Explicit_versus_implicit_SS.htm System.Net.Mail only support "explicit" SSL, as explained here: http://blogs.msdn.com/webdav_101/archive/2008/06/02/system-net-mail-with-ssl-to-authenticate-against-port-465.aspx So, I'm trying to use System.Net.Mail to connect to an SMTP server that I don't have any control over, and it's failing. How can I know for sure that it's failing because the server wants an "implicit" SSL connection? What test can I do from the client side? Ordinarily

My app targets Windows CE; it uses the Compact Framework I copied over some elsewhere-working code that uses WebClient, but it won't compile, saying, " The type or namespace name 'WebClient' could not be found (are you missing a using directive or an assembly reference?) " I do have a "using System.Net;" Because of that error, I also get, " The name 'HttpRequestHeader' does not exist in the current context " The code is: private static void SendXMLFile(string xmlFilepath, string uri) { using (var client = new WebClient()) { client.Headers[HttpRequestHeader.ContentType] = "application/x-www

Assume that a computer is connected to many networks (actually more than one). I can get a list of IP addresses which includes all IP addresses the computer have in networks, but how can I know that an IP address belongs to which network? sisve First, there are some terms you need to know. These example numbers presume an IPv4 network. IP address (192.168.1.1) subnet mask (255.255.255.0) network address (192.168.1.0) network interface card, NIC (one hardware card may have several of these) To see which network an IP address belongs to requires you to calculate the network address. This is easy

I want to check if the URL of a large file exists. I'm using the code below but it is too slow: public static bool TryGet(string url) { try { GetHttpResponseHeaders(url); return true; } catch (WebException) { } return false; } public static Dictionary<string, string> GetHttpResponseHeaders(string url) { Dictionary<string, string> headers = new Dictionary<string, string>(); WebRequest webRequest = HttpWebRequest.Create(url); using (WebResponse webResponse = webRequest.GetResponse()) { foreach (string header in webResponse.Headers) { headers.Add(header, webResponse.Headers[header]); } } return

I want to POST multiple files and form variables to a CGI script, all in one HTTP request. I believe this requires a HTTP post with multipart/form-data encoding. Here is a sample HTML form that sends the required information; I need to send the same information through the application: <form action="/process.php" enctype="multipart/form-data" method="post"> <input type="text" name="foo" value="bar"> <input type="text" name="blah" value="baz"> <input type="file" name="file1"> <input type="file" name="file2"> <input type="file" name="file3"> </form> Please note that the application is a C# .NET

I've read through pretty much all the documentation I can find but I'm yet to find a simple working example of how to get IE's default proxy settings using DefaultWebProxy() . This code seems to compile and work but how do I then go ahead and get the proxy URI as a string? HttpWebRequest webRequest = (HttpWebRequest)HttpWebRequest.Create("http://www.google.com"); if (WebRequest.DefaultWebProxy != null) { webRequest.Proxy = WebRequest.DefaultWebProxy; } EDIT: Since submitting this question I have found that one or many proxies can be set for different destinations or bypassed (perhaps for local