Can't find project classes/methods in test project
<p>In my namespace <code>Draughts</code> I have two projects, <code>Draughts</code> and <code>Draughts.UnitTests</code>. When I try to access <code>Draughts</code> methods/classes in <code>Draughts.UnitTests</code> it can't find anything at all. At the top of <code>Draughts.UnitTests</code> I put <code>using Draughts</code>. Any ideas?</p>

<p>BoardUnitTests.cs</p>

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Draughts;
using NUnit.Framework;

namespace Draughts.UnitTests
{
    public class BoardUnitTests
    {
        private Board GetBoard()
        {
            return true;
        }

        [Test]
        public void CheckValidBoardPosition_ValidPosition_ReturnsTrue()
        {
            Assert.AreEqual(1, 1);
        }
    }
}
</code></pre>

<p>In the code above it can't recognize Board which is a class I have defined in <code>Draughts</code>.</p>

<p>Here's a screenshot of my solution explorer:</p>

<p><a href="https://i.stack.imgur.com/JINWB.png" rel="noreferrer"><img src="https://i.stack.imgur.com/JINWB.png" alt="enter image description here"></a></p>