Xmlserialization with null elements

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C#

XML

XSD

XmlSerializer

I have a xml schema that based on that I have generated the schema class.
I am using xmlserializer and I have tried to add

nillable="true"

so that it shows me the elements that are not null.

What I have tried:

it shows me the result like this:

<Info>
  <Fl>
    <Name>Test</Name>
    <News d3p1:nil="true" xmlns:d3p1="http://www.w3.org/2001/XMLSchema-instance"/>
  </Fl>
</Info>

but I want the result like this:

<Info>
  <Fl>
    <Name>Test</Name>
    <News/>
  </Fl>
</Info>

This is my C# code :

Info resp = new Info();
resp.Fl = data;
var serializer = new XmlSerializer(typeof(Info));
using (var stream = new StreamWriter("E:\\report.xml"))
{
	XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces();
	namespaces.Add(string.Empty, string.Empty);
	
	serializer.Serialize(stream, resp, namespaces);
	bRet = true;
}

and this my xsd :

<xs:schema id="Response" xmlns:xs="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="qualified">
  <xs:element name="Info">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Fl" maxOccurs="unbounded" minOccurs="0">
          <xs:complexType>
            <xs:sequence>
              <xs:element type="xs:string" name="Name" nillable="true"/>
              <xs:element type="xs:string" name="News" nillable="true"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

How can I have the result I am expecting?