Function Ctor 2

FunctionCtor2.cs

// Configuration Service
public IConfigurationService ConfigService { get; }

public Function()
{
    // Set up Dependency Injection
    var serviceCollection = new ServiceCollection();
    ConfigureServices(serviceCollection);
    var serviceProvider = serviceCollection.BuildServiceProvider();

    // Get Configuration Service from DI system
    ConfigService = serviceProvider.GetService<IConfigurationService>();
}