Unable to instantiate class in 2 different Class library projects

Question

i have created 2 Class library projects in one solution , named Fundamentls and Fundamentals.test inside Fundamentls i have class Greeter

namespace Fundamentals
{
    public  class Greeter
    {
        public string SayHello() 
        {
            return "Hello" ;
        }
    }
}

now when in Fundamentals.test i try to do this

using Fundamentals; 
namespace Fundamentals.Test
{ 
    [TestFixture]
    public class GreeterTest
    {
        [Test]
        public void SayHelloReturnsHello() 
        {
            Greeter g = new Greeter();
        }
    }
}

now this is what i get

i have build the project after adding namespace but still does not work ,

Answer 1

Adding a using directive is not enough, first you need to add a reference to your assembly from your test project.Then include the namespace (optional) or use the fully-qualified name of the type.

You can refer to this documentation if you don't know how to add a reference to a different assembly from your project:

• How to: Add or Remove References By Using the Add Reference Dialog Box

Answer 2

It looks like the Fundamentals.Test project needs to refer to the Fundamentals project.

Just right click on the References node of the Fundamentals.Test project and select Add Reference from the right click menu.

Answer 3

If they are two different project then you will have to include the dll in other project. have you done that?

I mean have you, added the reference of the fundamentals project to fundamentals.test by clicking on reference folder and then click add reference . You can directly select the dll from projects tab.