UnityColliderSerialization

       public static string GetSerializationPath(string name)
        {
            return string.Format("{0}/{1}.bin", Application.streamingAssetsPath, name);
        }

        public static unsafe BlobAssetReference<Collider> DeserializeCollider(string filename, int bytes)
        {
            string path = GetSerializationPath(filename);

            using (StreamBinaryReader reader = new StreamBinaryReader(path, bytes))
            {
                int length = reader.ReadInt();
                Collider* collider = (Collider*)UnsafeUtility.Malloc(length, 16, Allocator.Temp);
                reader.ReadBytes(collider, length);
                var blob = BlobAssetReference<Collider>.Create(collider, length);
                UnsafeUtility.Free(collider, Allocator.Temp);
                return blob;
            }
        }

        public static unsafe int SerializeCollider(Collider* collider, string filename)
        {
            string path = GetSerializationPath(filename);
            int bytes = collider->MemorySize + sizeof(int);

            using (StreamBinaryWriter writer = new StreamBinaryWriter(path, bytes))
            {
                writer.Write(collider->MemorySize);
                writer.WriteBytes(collider, collider->MemorySize);
            }
            return bytes;
        }