i can not see MyLoad.TreeLoader(.... but why i can not see? i implemented iloader to TreeViewLoad. i should see TreeLoader why?

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

        private void Form1_Load(object sender, EventArgs e)
        {
            //treeView1.Nodes.Add("Test");
            iloader MyLoad = new TreeViewLoad();
            MyLoad.loader("test", treeView1, 1);
           // i can not  see MyLoad.TreeLoader(.... but why i can not see?
            // i implemented iloader to TreeViewLoad. i should see TreeLoader why?
        //TreeViewLoad myloader = new TreeViewLoad();
        }
    }

    interface iloader
    {
        void loader(string nodeName, TreeView myTre, int id);
    }

    class TreeViewLoad : iloader
    {
       public void TreeLoader(TreeView tre)
        {
           // i will call loader...
        }


        public void loader(string nodeName, TreeView myTre, int id)
        {

            myTre.Nodes.Add(nodeName + id.ToString());
            if (id