Cannot reference objects in referenced assembly

I have a solution in which there are many projects.

The project SqlSmoke.Objectsrefers to the project SqlSmoke.Data.

I set the link in SqlSmoke.Objectsto the solution SqlSmoke.Data. Then I can compile the whole solution.

However, it SqlSmoke.Datadoes not appear in intellisense, as shown below. However, when I change my namespace to SqlSmoke.Fred, I see SqlSmoke.Datain intellisense.

I do not see any circular links or other warnings in the output window that suggest that something else is happening.

What can I find to understand why I cannot refer to objects in the Data project from the Objects project?

using SqlSmoke.Data;


namespace SqlSmoke.Objects
{   
    public class Class2
    {
        public void Junk()
        {
            SqlSmoke.Data.  //No intellisense
        }        
    }
}

If I change the namespace, I get Intellisense:

using SqlSmoke.Data;


namespace SqlSmoke.ObjectsChangedNamespace
{   
    public class Class2
    {
        public void Junk()
        {
            SqlSmoke.Data.CodeObjectData.AddCodeObject("Test");  //Now I see intellisense
        }        
    }
}