diff --git a/Monorail/Monorail/FormMonorailCollection.cs b/Monorail/Monorail/FormMonorailCollection.cs
index 5f84667..d0a214f 100644
--- a/Monorail/Monorail/FormMonorailCollection.cs
+++ b/Monorail/Monorail/FormMonorailCollection.cs
@@ -61,7 +61,7 @@ namespace Monorail
             }
             FormMonorailConfig form = new();
             form.Show();
-            MonorailDelegate? monorailDelegate = new((m) => {
+            Action<DrawningMonorail>? monorailDelegate = new((m) => {
                 bool q = (obj + m);
                 if (q)
                 {
diff --git a/Monorail/Monorail/FormMonorailConfig.cs b/Monorail/Monorail/FormMonorailConfig.cs
index 545e9de..54892b8 100644
--- a/Monorail/Monorail/FormMonorailConfig.cs
+++ b/Monorail/Monorail/FormMonorailConfig.cs
@@ -15,14 +15,9 @@ namespace Monorail
     {
         DrawningMonorail? _monorail = null;
 
-        private event MonorailDelegate? EventAddMonorail;
+        private event Action<DrawningMonorail>? EventAddMonorail;
 
-        DrawningMonorail SelectedMonorail(DrawningMonorail monorail)
-        {
-            return _monorail;
-        }
-
-        public void AddEvent(MonorailDelegate ev)
+        public void AddEvent(Action<DrawningMonorail> ev)
         {
             if (EventAddMonorail == null)
             {
diff --git a/Monorail/Monorail/MonorailDelegate.cs b/Monorail/Monorail/MonorailDelegate.cs
deleted file mode 100644
index 99fee30..0000000
--- a/Monorail/Monorail/MonorailDelegate.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-using Monorail.DrawningObjects;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Monorail
-{
-    public delegate void MonorailDelegate(DrawningMonorail monorail);
-
-}