How can I get all IP addresses for my local machine?

[C#]
string s ="";

System.Net.IPAddress[] addressList = Dns.GetHostByName(Dns.GetHostName()).AddressList;

for (int i = 0; i < addressList.Length; i ++)
{
s += addressList[i].ToString() + "\n";
}

textBox1.Text = s;

[VB.NET]
Dim s As String = ""

Dim addressList As System.Net.IPAddress() = Dns.GetHostByName(Dns.GetHostName()).AddressList

Dim i As Integer
For i = 0 To addressList.Length - 1
s += addressList(i).ToString() + ControlChars.Lf
Next i

textBox1.Text = s