How to serialize nulls in arrays?

[JohanLarsson]

[Test]
public void ArrayOfStringWithNull()
{
    var value = new object[] { "abc", null, "cde" };
    var actual = Xml.Serialize(value);
    var expected = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + Environment.NewLine +
                   "<ArrayOfString>" + Environment.NewLine +
                   "  <String>abc</String>" + Environment.NewLine +
                   "  <String />" + Environment.NewLine +
                   "  <String>cde</String>" + Environment.NewLine +
                   "</ArrayOfString>";
    Assert.AreEqual(expected, actual);
}

Dunno if using <String /> for null and <String></String> for string.Empty is a good idea, probably not.

[JohanLarsson]

[Test]
public void ArrayOfDifferentWithNull()
{
    var value = new object[] { "abc", null, 3 };
    var actual = Xml.Serialize(value);
    var expected = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + Environment.NewLine +
                   "<ArrayOfObject>" + Environment.NewLine +
                   "  <String>1</String>" + Environment.NewLine +
                   "  <??? />>" + Environment.NewLine +
                   "  <Int32>3</Int32>" + Environment.NewLine +
                   "</ArrayOfObject>";
    Assert.AreEqual(expected, actual);
}

[jnm2]

<Null />?

[JohanLarsson]

Yes it makes sense but we make the null name configurable if so

[JohanLarsson]

https://www.w3.org/TR/xmlschema-1/#xsi_nil