Unity application block 2.0 - The given assembly name or codebase was invalid

Question

Interfaces (In the assembly named "Interfaces". In project :- Interfaces)

namespace Interfaces
{
    public interface IDoSomeWork1
    {
        string DoSomeWork1();
    }
}

namespace Interfaces
{
    public interface IDoSomeWork2
    {
        string DoSomeWork2();
    }
}

Dependencies (In the assembly named "Entities". In project :- Entities)

namespace Entities
{
    public class ClassB : IDoSomeWork1
    {
        public string DoSomeWork1()
        {
            return this.ToString();
        }
    }
}

namespace Entities
{
    public class ClassC : IDoSomeWork2
    {
        public string DoSomeWork2()
        {
            return this.ToString();
        }
    }
}

Class (In project :- UsingUnity)

public class ClassA
    {
        [Dependency]
        public IDoSomeWork1 DoSomeWork1 { get; set; }
        [Dependency]
        public IDoSomeWork2 DoSomeWork2 { get; set; }


        public void SomeMethodInClassA()
        {
            Console.WriteLine(DoSomeWork1.DoSomeWork1());
            Console.WriteLine(DoSomeWork2.DoSomeWork2());
        }
    }

App.Config (In a console application project :- ConsoleUsingUnity)

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="unity"
                 type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,
                   Microsoft.Practices.Unity.Configuration" />
    </configSections>
    <unity>
        <containers>
            <container>
                <types>
                    <type type="Interfaces.IDoSomeWork1, Interfaces"
                          mapTo="Entities.ClassB, Entities" />
                    <type type="Interfaces.IDoSomeWork2, Interfaces"
                          mapTo="Entities.ClassC, Entities" />
                </types>
            </container>
        </containers>
    </unity>
</configuration>

The client (In a console application project :- ConsoleUsingUnity)

public class Class1
    {
        static void Main(string[] args)
        {
            IUnityContainer container = new UnityContainer();

            // Load from config file
            UnityConfigurationSection section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity");
            section.Configure(container);

            ClassA classA = container.Resolve<ClassA>();
            classA.SomeMethodInClassA();
        }
    }

And when I run the client, I get the following error at section.Configure(container);:-

The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)

I am not sure If there is anything wrong with the config or the type. Could anyone please point out the mistake here?

Answer 1

In case anyone else ever has the same problem - I was also getting this error but had a slightly different problem. I was trying to load an assembly that clearly existed like the following:

Assembly.Load("C:\\Program Files\\MyProgram\\MyAssembly.dll");

After lots of trial and error I figured out that you aren't supposed to pass the path and you certainly aren't supposed to include .dll extension. The following fixed my issue:

Assembly.Load("MyAssembly");

Hopefully that helps someone else sooner or later!