submodule对gitea不管用，所以直接拉了一份拉格兰

Lagrange.Core/Lagrange.Core.Test/Protobuf.cs

@@ -0,0 +1,24 @@
+using Lagrange.Core.Internal.Packets.Login.Ecdh;
+using Lagrange.Core.Utility.Extension;
+using ProtoBuf;
+
+namespace Lagrange.Core.Test;
+
+public class Protobuf
+{
+    public void Test()
+    {
+        
+        var test = new SsoKeyExchange()
+        {
+            PubKey = new byte[] { 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 },
+            GcmCalc2 = new byte[] { 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 },
+            GcmCalc1 = new byte[] { 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 },
+            Timestamp = 23456789,
+            Type = 1
+        };
+        using var stream = new MemoryStream();
+        Serializer.Serialize(stream, test);
+        Console.WriteLine(stream.ToArray().Hex(false, true));
+    }
+}