Fix PureResolve

src/DataStructure/Link/Link.cs

@@ -233,4 +233,18 @@ public class Link<TObject> : IEnumerable<TObject>
         Remove(res);
         return resValue;
     }
+    /// <summary>
+    ///     remove the last item
+    /// </summary>
+    /// <returns></returns>
+    /// <exception cref="Exception"></exception>
+    public TObject RemoveLast()
+    {
+        LinkNode<TObject> res = Last;
+        if (res.IsEnding)
+            throw new Exception("TODO");
+        TObject resValue = res.Value;
+        Remove(res);
+        return resValue;
+    }
 }