How Can I Quickly Verify Network Connectivity in .NET?

The fastest way to verify .NET network connection

In .NET application development, it is critical to determine the best technique for network connection verification. In scenarios where access to the Internet is required, a reliable and efficient mechanism is crucial. This article provides an effective solution to this need.

Use reliable connection check

To ensure reliable connection testing, consider the following code snippet:

<code class="language-csharp">public static bool CheckForInternetConnection(int timeoutMs = 10000, string url = null)
{
    try
    {
        url ??= CultureInfo.InstalledUICulture switch
        {
            { Name: var n } when n.StartsWith("fa") => // 伊朗
                "http://www.aparat.com",
            { Name: var n } when n.StartsWith("zh") => // 中国
                "http://www.baidu.com",
            _ =>
                "http://www.gstatic.com/generate_204",
        };

        var request = (HttpWebRequest)WebRequest.Create(url);
        request.KeepAlive = false;
        request.Timeout = timeoutMs;
        using (var response = (HttpWebResponse)request.GetResponse())
            return true;
    }
    catch
    {
        return false;
    }
}</code>

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