// C# is a strongly typed language. This means that when the program is compiled the compiler ensures that all actions that are performed are valid in the context of
// the types that have been defined in the program.As an example, if a class does not contain a method with a particular name, the C# compiler will refuse to
// generate a call to that method.As a way of making sure that C# programs are valid at the time that they are executed, strong typing works very well.Such a
// strong typing regime, however, can cause problems when a C# program is required to interact with systems that do not have their origins in C# code. Such
// situations arise when using Common Object Model(COM) interop, the Document Object Model(DOM), working with objects generated by C#
// reflection, or when interworking with dynamic languages such as JavaScript. In these situations, you need a way to force the compiler to interact with
// objects for which the strong typing information that is generated from compiled C# is not available. The keyword dynamic is used to identify items for which
// the C# compiler should suspend static type checking. The compiler will then generate code that works with the items as described, without doing static
// checking to make sure that they are valid.Note that this doesn’t mean that a program using dynamic objects will always work; if the description is incorrect
// the program will fail at run time.
public void DynamicTypes()
{
MessageDisplay m = new MessageDisplay();
m.Display("Hello");
dynamic d = new MessageDisplay();
d.MethodThatDoesNotExist("Hello");
//This program will compile, but when the program is executed an exception will be generated when the method is called.
// This aspect of the dynamic keyword makes it possible to interact with objects that have behaviors, but not the C# type information that the C# compiler would
// normally use to ensure that any interaction is valid.
}
public static int Main(string[] args)
{
// Create SettingsService early so we know the trace level right at the start
SettingsService settingsService = new SettingsService();
InternalTrace.Initialize("nunit-gui_%p.log", (InternalTraceLevel)settingsService.GetSetting("Options.InternalTraceLevel", InternalTraceLevel.Default));
log.Info("Starting NUnit GUI");
GuiOptions guiOptions = new GuiOptions(args);
GuiAttachedConsole attachedConsole = null;
if (guiOptions.console)
{
log.Info("Creating attached console");
attachedConsole = new GuiAttachedConsole();
}
if (guiOptions.help)
{
MessageDisplay.Display(guiOptions.GetHelpText());
return(0);
}
if (!guiOptions.Validate())
{
string message = "Error in command line";
MessageDisplay.Error(message + Environment.NewLine + Environment.NewLine + guiOptions.GetHelpText());
log.Error(message);
return(2);
}
if (guiOptions.cleanup)
{
log.Info("Performing cleanup of shadow copy cache");
DomainManager.DeleteShadowCopyPath();
return(0);
}
if (!guiOptions.NoArgs)
{
if (guiOptions.lang != null)
{
log.Info("Setting culture to " + guiOptions.lang);
Thread.CurrentThread.CurrentUICulture =
new CultureInfo(guiOptions.lang);
}
}
try
{
// Add Standard Services to ServiceManager
log.Info("Adding Services");
ServiceManager.Services.AddService(settingsService);
ServiceManager.Services.AddService(new DomainManager());
ServiceManager.Services.AddService(new RecentFilesService());
ServiceManager.Services.AddService(new ProjectService());
ServiceManager.Services.AddService(new TestLoader(new GuiTestEventDispatcher()));
ServiceManager.Services.AddService(new AddinRegistry());
ServiceManager.Services.AddService(new AddinManager());
ServiceManager.Services.AddService(new TestAgency());
// Initialize Services
log.Info("Initializing Services");
ServiceManager.Services.InitializeServices();
}
catch (Exception ex)
{
MessageDisplay.FatalError("Service initialization failed.", ex);
log.Error("Service initialization failed", ex);
return(2);
}
// Create container in order to allow ambient properties
// to be shared across all top-level forms.
log.Info("Initializing AmbientProperties");
AppContainer c = new AppContainer();
AmbientProperties ambient = new AmbientProperties();
c.Services.AddService(typeof(AmbientProperties), ambient);
log.Info("Constructing Form");
NUnitForm form = new NUnitForm(guiOptions);
c.Add(form);
try
{
log.Info("Starting Gui Application");
Application.Run(form);
log.Info("Application Exit");
}
catch (Exception ex)
{
log.Error("Gui Application threw an excepion", ex);
throw;
}
finally
{
log.Info("Stopping Services");
ServiceManager.Services.StopAllServices();
}
if (attachedConsole != null)
{
Console.WriteLine("Press Enter to exit");
Console.ReadLine();
attachedConsole.Close();
}
log.Info("Exiting NUnit GUI");
InternalTrace.Close();
return(0);
}
private static void dynamics()
{
dynamic display = new MessageDisplay("Hello World");
display.Display();
}