private void WriteSkinGroup(SkinGroup group)
 {
     _writer.Write((uint)group.Skins.Count);
     for (int i = 0; i < group.Skins.Count; i++)
     {
         WriteSkin(group.Skins[i]);
     }
 }
 private SkinGroup ReadSkinGroup()
 {
     SkinGroup result = new SkinGroup();
     uint count = _reader.ReadUInt32();
     for(uint i = 0; i < count; i++)
     {
         result.Skins.Add(ReadSkin());
     }
     return result;
 }