BusinessServiceScan.cs

public void ConfigureServices(IServiceCollection services)
{
    ...
    
    services.Scan(i =>
        i.FromCallingAssembly()
        .AddClasses(c => c.Where(i => i.IsClass && i.Name.EndsWith("BusinessService")))
        .AsImplementedInterfaces()
        .WithTransientLifetime()
    );

    ...
}