C#

var a = {1,2,3,4};
var b = {2,3,4,5}
var c = a.Zip(b, (aa, bb)=> aa * bb).ToList();
//  c = {2,  6, 12, 20};

//  :

var d = {…};
var e = {…};

if (d.Zip(e, (dd, ee)=> dd==ee).All())
{   // tests if all elements are equals  (same as a.SequenceEqual(b))

set
{
    if (_SelectedCompanyHeader != value)
    {
        _SelectedCompanyHeader = value;
        RaisePropertyChanged(nameof(SelectedCompanyHeader));
        _ = LoadProjects();
    }
}

protected void RaisePropertyChanged([CallerMemberName] string propertyName = default) { ... }

...

public CompanyHeaderEntity SelectedCompanyHeader
{
    get { return _SelectedCompanyHeader; }
    set
    {
        if (_SelectedCompanyHeader != value)
        {
            _SelectedCompanyHeader = value;
            RaisePropertyChanged(); // <- The current property name will automatically be passed here.
            _ = LoadProjects();
        }
    }
}

// Build a external host for Docker Deployment
var certificateSettings = config.GetSection("certificateSettings");
var certificateFileName = certificateSettings.GetValue<string>("filename");
var certificatePassword = certificateSettings.GetValue<string>("password");
var certBuffer = File.ReadAllBytes(certificateFileName);
var serverCert = new X509Certificate2(certBuffer, certificatePassword);

PLotBusiness

    Finances ?

    PLotData  : map vehicles to locations, status, etc.
    
    VehicleManager
        Cars
        Vans
    
    PLotManager
        Spaces

public IEnumerable<Vehicle>  Cars { get { return _dictionary.Values; } }

// can be shorted to 
// public IEnumerable<Vehicle>  Cars => _dictionary.Values;
// if you like being modern.

private Dictionary<string, Vehicle> _dictionary;