C#

using junkie;

namespace junk
{
    public enum Output_State
    {
        OFF,
        ON,
        Dont_Care,
    }

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void button1_Click(object sender, EventArgs e)
        {
            ClassTwo testClassTwo = new ClassTwo();
            testClassTwo.TestMethod(Output_State.Dont_Care);
        }
    }

    public class ClassTwo
    {
        junkie.NewClass1 testClassThree = new junkie.NewClass1();

        public void TestMethod(Output_State output)
        {
            testClassThree.TestMethod(output);
        }
    }
}

namespace junkie
{
    public enum Output_State
    {
        OFF,
        ON,
        Dont_Care,
    }

    class NewClass1
    {
        public void TestMethod(Output_State output)
        {
            switch (output)
            {
                case Output_State.ON: MessageBox.Show("ON"); break;
                case Output_State.OFF: MessageBox.Show("OFF"); break;
                case Output_State.Dont_Care: MessageBox.Show("Don't Care"); break;
                default: MessageBox.Show("HUH?"); break;
            }
        }
    }
}