Rename the common modules.

codes/csharp/utils/Vertex.cs

@@ -0,0 +1,33 @@
+/**
+ * File: Vertex.cs
+ * Created Time: 2023-02-06
+ * Author: zjkung1123 (zjkung1123@gmail.com), krahets (krahets@163.com)
+ */
+
+namespace hello_algo.utils;
+
+/* 顶点类 */
+public class Vertex {
+    public int val;
+    public Vertex(int val) {
+        this.val = val;
+    }
+
+    /* 输入值列表 vals ，返回顶点列表 vets */
+    public static Vertex[] ValsToVets(int[] vals) {
+        Vertex[] vets = new Vertex[vals.Length];
+        for (int i = 0; i < vals.Length; i++) {
+            vets[i] = new Vertex(vals[i]);
+        }
+        return vets;
+    }
+
+    /* 输入顶点列表 vets ，返回值列表 vals */
+    public static List<int> VetsToVals(List<Vertex> vets) {
+        List<int> vals = new List<int>();
+        foreach (Vertex vet in vets) {
+            vals.Add(vet.val);
+        }
+        return vals;
+    }
+}