[Xml serialization]ReflectionXmlSerializationWriter is using Array.GetValue method for primary type arrays

[TrayanZapryanov]

When serializing arrays of primary type I've found a code which fallbacks to Array.GetValue in ReflectionXmlSerializationWriter .WriteArrayItems method. Code:

 var arr = o as IList;

  if (arr != null)
  {
      for (int i = 0; i < arr.Count; i++)
      {
          object? ai = arr[i];
          WriteElements(ai, null/*choiceName + "i"*/, elements, text, choice, true, true);
      }
  }

This results in a lot of allocations in simple serialization loop program.

This is not a real issue found in production code - just something that popups while trying to optimize the upper allocation :