Connect to Always-On VPN using C#

This is my first time writing a post, so bear with me.

I've made a program for my work and have been asked to implement a feature in it now, where our users are able to connect to our VPN (Always-On VPN), using the program. However, I don't seem to be able to find any information on how to actually establish the connection programmatically. I need to basically be able to click on a button that says "Connect to VPN" and it will then establish the connection, much like it does in Windows when clicking connect:

Clicking Connect in Windows

I've figured out how to see if the connection is established or not via my program:

    public bool CheckForVPNInterface()
    {
        if (NetworkInterface.GetIsNetworkAvailable())
        {
            NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();

            foreach (NetworkInterface @interface in interfaces)
            {
                if (@interface.Description.Contains("Always-On VPN") && @interface.OperationalStatus == OperationalStatus.Up)
                {
                    Label_Connection.BackColor = Color.Green;
                    return true;
                }
                else
                    Label_Connection.BackColor = Color.Red;
            }
            
        }
        return false;    
    }

But now just need to have the "Connect to VPN" button.

Any idea on how to do so?

NOTE: I've tried using rasdial, but that didn't work