How Can I Get My Computer's Local IP Address in C#?

Retrieving Your Local IP Address in C#

Challenge: Identify the IP address assigned to your computer by your router, excluding addresses from network interfaces (like a direct modem connection).

Solution:

This C# code snippet efficiently retrieves your computer's local IP address:

<code class="language-csharp">public static string GetLocalIPAddress()
{
    var hostInfo = Dns.GetHostEntry(Dns.GetHostName());
    foreach (var ipAddress in hostInfo.AddressList)
    {
        if (ipAddress.AddressFamily == AddressFamily.InterNetwork)
        {
            return ipAddress.ToString();
        }
    }
    throw new Exception("No IPv4 address found on the system!");
}</code>

The code iterates through the IP addresses associated with your computer and returns the first IPv4 address it encounters. If no IPv4 address is detected, an exception is raised.

Verifying Network Connection:

To confirm network connectivity, use this simple C# method:

<code class="language-csharp">System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();</code>

This returns true if a network connection is active, and false otherwise.

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