Question

My solution contains several projects including Commons and TerminatorConsole2. Now I want to refer Commons.Constants class from TerminatorConsole2.Utils.Constants file:

namespace TerminatorConsole2.Utils
{
    class Constants
    {
        public const string MANAGEMENT_CONSOLE_ADDRESS =
            Commons.Constants.USE_EXTRA_WCF_INSTANCE ?
                "net.pipe://localhost/xxx" :
                "net.pipe://localhost";

But I receive “Cannot resolve symbol” on “Commons”.
Adding “using Commons” doesn’t help, I receive same error.

Why one project can not use class from another project of the same solution?

UPD Adding Constants class. However I already use it from one another project so I think this class is OK:

namespace Commons
{

public class Constants
{
    public const int MAX_INSTRUMENTS_NUMBER_IN_SYSTEM = 200;
    public const bool USE_EXTRA_WCF_INSTANCE = true;
}

}

Answer 1

jeroenh correctly answered the question in a comment… I needed to add a reference.

I didn’t need to declare the class public, since only class which is used should be public. class that “using” doesn’t have to be public.