"Connect & Auth:" examples return true for the base domain of any local IP

[Reelix]

Code (Mostly from http://sharpcifsstd.dobes.jp/ with a slight modification)

        SharpCifs.Config.SetProperty("jcifs.smb.client.lport", "8137");
        string invalidIP = "192.168.0.240"; // Make sure there are no machines on your local network with the specific IP
        //string to Auth-Object.
        Console.WriteLine("SMB1");
        var auth1 = new NtlmPasswordAuthentication("anonymous:Password");
        var smb1 = new SmbFile($"smb://{invalidIP}/ ", auth1);
        Console.WriteLine($"exists? {smb1.Exists()}");
        //3 string to Auth-Object.
        Console.WriteLine("SMB2");
        var auth2 = new NtlmPasswordAuthentication(null, "anonymous", "Password");
        var smb2 = new SmbFile($"smb://{invalidIP}/", auth2);
        Console.WriteLine($"exists? {smb2.Exists()}");

        //Insert auth info into URL.
        Console.WriteLine("SMB3");
        var smb3 = new SmbFile($"smb://Username:Password@{invalidIP}/");
        Console.WriteLine($"exists? {smb3.Exists()}");
        //You can store authentication information in SharpCifs.Std.
        SharpCifs.Config.SetProperty("jcifs.smb.client.username", "UserName");
        SharpCifs.Config.SetProperty("jcifs.smb.client.password", "Password");

        Console.WriteLine("SMB4");

        var smb4 = new SmbFile($"smb://{invalidIP}/");
        Console.WriteLine($"exists? {smb4.Exists()}");`

Output:

SMB1
exists? True
SMB2
exists? True
SMB3
exists? True
SMB4
exists? True

Non-existent devices should obviously lack SMB1/2/3/4 support