Question How to use NetworkSerializable with CustomStruct ,Transfer between Server and client

I custom serializable types String Array ,
learn https://docs-multiplayer.unity3d.co...ced-topics/serialization/inetworkserializable
and try it.
I Expect the result is:

Server Received the RPC #0
#Test Server RPC#:a
Server Received the RPC #1
#Test Server RPC#:a
Server Received the RPC #2
...............................​

But Real Rsult :

Server Received the RPC #0
#Test Server RPC#:a
Server Received the RPC #1
Server Received the RPC #2
Server Received the RPC #3
.........................................​

Can Tell me Why, Detail..
///////////////////////////////////////////////////////////////////////////
The code as below

Code (CSharp):

1. using Unity.Netcode;
2. using UnityEngine;
3.  
4. public class RpcTest : NetworkBehaviour
5. {
6.  
7.     private MyCustomStruct mystring;
8.  
9.     public override void OnNetworkSpawn()
10.     {
11.        
12.         mystring.Array = new string[]{ "a", "b", "c" };
13.         if (IsClient)
14.         {
15.             TestServerRpc(0,mystring);
16.         }
17.     }
18.  
19.     [ClientRpc]
20.     void TestClientRpc(int value,  MyCustomStruct mystring)
21.     {
22.         if (IsClient)
23.         {
24.             Debug.Log("Client Received the RPC #" + value);
25.             Debug.Log("#Test Client RPC#:" + mystring.Array[0].ToString());
26.             TestServerRpc(value + 1, mystring);
27.         }
28.     }
29.  
30.     [ServerRpc]
31.     void TestServerRpc(int value, MyCustomStruct mystring)
32.     {
33.         Debug.Log("Server Received the RPC #" + value);
34.         Debug.Log("#Test Server RPC#:" + mystring.Array[0].ToString());
35.         TestClientRpc(value, mystring);
36.     }
37.  
38.     public struct MyCustomStruct : INetworkSerializable
39.     {
40.         public string[] Array;
41.  
42.         public void NetworkSerialize<T>(BufferSerializer<T> serializer) where T : IReaderWriter
43.         {
44.             // Length
45.             int length = 0;
46.             if (!serializer.IsReader)
47.             {
48.                 length = Array.Length;
49.             }
50.  
51.             serializer.SerializeValue(ref length);
52.  
53.             // Array
54.             if (serializer.IsReader)
55.             {
56.                 Array = new string[length];
57.             }
58.  
59.             for (int n = 0; n < length; ++n)
60.             {
61.                 serializer.SerializeValue(ref Array[n]);
62.             }
63.         }
64.     }
65. }

 

OK~ I found the sloution~~~
modify to:

Debug.Log("Server Received the RPC #" + value + " this String: "++ mystring.Array[0]);

This seems to solve it, although I don't know why