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Src/Mark/MarkService.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Net.Project.B.Mark
+{
+    public interface IMarkService
+    {
+        void Mark(int id);
+        void CancelMark(int id);
+        public event Action<int, bool> OnMark;
+        IReadOnlyCollection<int> InMarking { get; }
+    }
+}
+