Hi,

I have a simple console application where I have the following setup:

public interface ILogger

{ void Log(string message); }

class NullLogger : ILogger { private readonly string version;

 public NullLogger()
 {

version = "1.0"; } public NullLogger(string v) { version = v; } public void Log(string message) { Console.WriteLine("NULL> " + version + " : " + message); } }

The configuration details are below:

<type type="UnityConsole.ILogger, UnityConsole" mapTo="UnityConsole.NullLogger, UnityConsole">

My calling code looks as below:

IUnityContainer container = new UnityContainer();

UnityConfigurationSection section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity"); section.Containers.Default.Configure(container); ILogger nullLogger = container.Resolve(); nullLogger.Log("hello");

This works fine, but once I give a name to this type something like:

<type type="UnityConsole.ILogger, UnityConsole" mapTo="UnityConsole.NullLogger, UnityConsole" name="NullLogger">

The above calling code does not work even if I explicitly register the type using

container.RegisterType<ILogger, NullLogger>();

I get the error:

{"Resolution of the dependency failed, type = \"UnityConsole.ILogger\", name = \"\". Exception message is: The current build operation (build key Build Key[UnityConsole.NullLogger, null]) failed: The parameter v could not be resolved when attempting to call constructor UnityConsole.NullLogger(System.String v). (Strategy type BuildPlanStrategy, index 3)"}

Why doesn't unity look into named instances? To get it to work, I'll have to do:

ILogger nullLogger = container.Resolve("NullLogger");

Where is this behavior documented?

Arun