Best way to create IPEndpoint from string

This is one solution...

public static IPEndPoint CreateIPEndPoint(string endPoint)
{
    string[] ep = endPoint.Split(':');
    if(ep.Length != 2) throw new FormatException("Invalid endpoint format");
    IPAddress ip;
    if(!IPAddress.TryParse(ep[0], out ip))
    {
        throw new FormatException("Invalid ip-adress");
    }
    int port;
    if(!int.TryParse(ep[1], NumberStyles.None, NumberFormatInfo.CurrentInfo, out port))
    {
        throw new FormatException("Invalid port");
    }
    return new IPEndPoint(ip, port);
}

Edit: Added a version that will handle IPv4 and IPv6 the previous one only handles IPv4.

// Handles IPv4 and IPv6 notation.
public static IPEndPoint CreateIPEndPoint(string endPoint)
{
    string[] ep = endPoint.Split(':');
    if (ep.Length < 2) throw new FormatException("Invalid endpoint format");
    IPAddress ip;
    if (ep.Length > 2)
    {
        if (!IPAddress.TryParse(string.Join(":", ep, 0, ep.Length - 1), out ip))
        {
            throw new FormatException("Invalid ip-adress");
        }
    }
    else
    {
        if (!IPAddress.TryParse(ep[0], out ip))
        {
            throw new FormatException("Invalid ip-adress");
        }
    }
    int port;
    if (!int.TryParse(ep[ep.Length - 1], NumberStyles.None, NumberFormatInfo.CurrentInfo, out port))
    {
        throw new FormatException("Invalid port");
    }
    return new IPEndPoint(ip, port);
}

I had the requirement of parsing an IPEndpoint with IPv6, v4 and hostnames. The solution I wrote is listed below:

    public static IPEndPoint Parse(string endpointstring)
    {
        return Parse(endpointstring, -1);
    }

    public static IPEndPoint Parse(string endpointstring, int defaultport)
    {
        if (string.IsNullOrEmpty(endpointstring)
            || endpointstring.Trim().Length == 0)
        {
            throw new ArgumentException("Endpoint descriptor may not be empty.");
        }

        if (defaultport != -1 &&
            (defaultport < IPEndPoint.MinPort
            || defaultport > IPEndPoint.MaxPort))
        {
            throw new ArgumentException(string.Format("Invalid default port '{0}'", defaultport));
        }

        string[] values = endpointstring.Split(new char[] { ':' });
        IPAddress ipaddy;
        int port = -1;

        //check if we have an IPv6 or ports
        if (values.Length <= 2) // ipv4 or hostname
        {
            if (values.Length == 1)
                //no port is specified, default
                port = defaultport;
            else
                port = getPort(values[1]);

            //try to use the address as IPv4, otherwise get hostname
            if (!IPAddress.TryParse(values[0], out ipaddy))
                ipaddy = getIPfromHost(values[0]);
        }
        else if (values.Length > 2) //ipv6
        {
            //could [a:b:c]:d
            if (values[0].StartsWith("[") && values[values.Length - 2].EndsWith("]"))
            {
                string ipaddressstring = string.Join(":", values.Take(values.Length - 1).ToArray());
                ipaddy = IPAddress.Parse(ipaddressstring);
                port = getPort(values[values.Length - 1]);
            }
            else //[a:b:c] or a:b:c
            {
                ipaddy = IPAddress.Parse(endpointstring);
                port = defaultport;
            }
        }
        else
        {
            throw new FormatException(string.Format("Invalid endpoint ipaddress '{0}'", endpointstring));
        }

        if (port == -1)
            throw new ArgumentException(string.Format("No port specified: '{0}'", endpointstring));

        return new IPEndPoint(ipaddy, port);
    }

    private static int getPort(string p)
    {
        int port;

        if (!int.TryParse(p, out port)
         || port < IPEndPoint.MinPort
         || port > IPEndPoint.MaxPort)
        {
            throw new FormatException(string.Format("Invalid end point port '{0}'", p));
        }

        return port;
    }

    private static IPAddress getIPfromHost(string p)
    {
        var hosts = Dns.GetHostAddresses(p);

        if (hosts == null || hosts.Length == 0)
            throw new ArgumentException(string.Format("Host not found: {0}", p));

        return hosts[0];
    }

This has been tested to work with the following examples:

• 0.0.0.0:100
• 0.0.0.0
• [::1]:100
• [::1]
• ::1
• [a:b:c:d]
• [a:b:c:d]:100
• example.org
• example.org:100

It looks like there is already a built in Parse method that handles ip4 and ip6 addresses http://msdn.microsoft.com/en-us/library/system.net.ipaddress.parse%28v=vs.110%29.aspx

// serverIP can be in ip4 or ip6 format
string serverIP = "192.168.0.1";
int port = 8000;
IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse(serverIP), port);

Here is my version of parsing text to IPEndPoint:

private static IPEndPoint ParseIPEndPoint(string text)
{
    Uri uri;
    if (Uri.TryCreate(text, UriKind.Absolute, out uri))
        return new IPEndPoint(IPAddress.Parse(uri.Host), uri.Port < 0 ? 0 : uri.Port);
    if (Uri.TryCreate(String.Concat("tcp://", text), UriKind.Absolute, out uri))
        return new IPEndPoint(IPAddress.Parse(uri.Host), uri.Port < 0 ? 0 : uri.Port);
    if (Uri.TryCreate(String.Concat("tcp://", String.Concat("[", text, "]")), UriKind.Absolute, out uri))
        return new IPEndPoint(IPAddress.Parse(uri.Host), uri.Port < 0 ? 0 : uri.Port);
    throw new FormatException("Failed to parse text to IPEndPoint");
}

Tested with:

• 0.0.0.0
• 0.0.0.0:100
• [::1]:100
• [::1]:0
• ::1
• [2001:db8:85a3:8d3:1319:8a2e:370:7348]
• [2001:db8:85a3:8d3:1319:8a2e:370:7348]:100
• http://0.0.0.0
• http://0.0.0.0:100
• http://[::1]
• http://[::1]:100
• https://0.0.0.0
• https://[::1]