c#: Not finding object in list

Question

I am using LINQ .Find() and it's not stopping when it finds a match. I have:

List<ipFound> ipList = new List<ipFound>();

ipFound ipTemp = ipList.Find(x => x.ipAddress == srcIP); 

if (ipTemp == null) {
   // this is always null
}

public class ipFound
{
    public System.Net.IPAddress ipAddress;
    public int bytesSent;
    public int bytesReceived;
    public int bytesTotal;
}

Any ideas? I'm going nuts over here.

Thanks!

Answer 1

You need to use .Equals instead of ==.

var a = IPAddress.Parse("1.2.3.4");
var b = IPAddress.Parse("1.2.3.4");
Console.WriteLine(a == b);  // False
Console.WriteLine(a.Equals(b));  // True

In the sample above, a == b is False because those are two different objects. However, a.Equals(b) is True because they have equal values.

Answer 2

Use IPAddress.Equals instead of comparing references (==):

ipFound ipTemp = ipList.Find(x => x.ipAddress.Equals(srcIP)); 

As a side note, usually class names are PascalCased (IPFound vs. ipFound)

Example: http://ideone.com/lAeiMm