I created two projects: ConsoleApp1 and ConsoleApp2.

What you should do is to add the ConsoleApp2 reference in the ConsoleApp1 project to access the ConsoleApp2 variables in the ConsoleApp1 project.

To do this do the following:

1. Add project reference 2 in project 1

Right click on References , and select Add Reference :

2. Access the desired variable

Once this is done, within project 1 you can already access project variable 2 as follows:

  namespace ConsoleApp1
  {
      public class Program
      {
          static void Main(string[] args)
          {
              var teste = ConsoleApp2.Teste.Caminho;            
          }
      }
  }

Using Console.Business.Caminho works. I created a project without setting anything up and it worked. I just made some changes to simplify the compilation, but if your code is the one posted in the question there is no way to go wrong.

I would change the name Console because if it is using a using System it will conflict with the Console class contained in that namespace . Of course if using the full name of what is accessing works, as in the code below. In this case it is even possible to delete the using Console '.

Since you are on the same project you do not have to do anything else. If it is in another project and is in the same solution already is to have a reference for this project, unless it has corrupted something. If it's a project in a separate location (it's not what it shows in the question) then you need to add a project reference to it ( with visual support ).

using Console;

namespace BusinessDAL {
    public class ArquivoDAL {   
        string valor =  Console.Business.Caminho;
        static void Main() => System.Console.WriteLine("Hello, World!"); //só p/ compilar
    }
}

See working Coding Ground . Also I placed GitHub for future reference .