Generate C# enumeration with explicit numerical values from XSD

I have an XSD where I define an enumeration specifying numerical values for each element. It looks as follows:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:tns="http://mariusbancila.ro/demo/1.0" xmlns:ser="http://schemas.microsoft.com/2003/10/Serialization/" elementFormDefault="qualified" targetNamespace="http://mariusbancila.ro/demo/1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:simpleType name="statusCode">
    <xs:restriction base="xs:string">
      <xs:enumeration value="none"/>
      <xs:enumeration value="alpha">
        <xs:annotation>
          <xs:appinfo>
            <EnumerationValue xmlns="http://schemas.microsoft.com/2003/10/Serialization/">100</EnumerationValue>
          </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="beta">
        <xs:annotation>
          <xs:appinfo>
            <EnumerationValue xmlns="http://schemas.microsoft.com/2003/10/Serialization/">200</EnumerationValue>
          </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="gamma">
        <xs:annotation>
          <xs:appinfo>
            <EnumerationValue xmlns="http://schemas.microsoft.com/2003/10/Serialization/">300</EnumerationValue>
          </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>  
  
   <xs:element name="demo">
     <xs:complexType>
       <xs:sequence>
         <xs:element name="id" type="xs:integer"/>
         <xs:element name="status" type="tns:statusCode"/>
       </xs:sequence>
     </xs:complexType>
   </xs:element>
  
</xs:schema>

I use xsd.exe to generate C# classes from this (xsd.exe /namespace:Demo /language:cs /c demo.xsd). The result is as follows:

[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.8.3928.0")]
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://mariusbancila.ro/demo/1.0")]
public enum statusCode {
  
  /// <remarks/>
  none,
  
  /// <remarks/>
  alpha,
  
  /// <remarks/>
  beta,
  
  /// <remarks/>
  gamma,
}

My expectation is that I get the following:

[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.8.3928.0")]
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://mariusbancila.ro/demo/1.0")]
public enum statusCode {
  
  /// <remarks/>
  none,
  
  /// <remarks/>
  alpha = 100,
  
  /// <remarks/>
  beta = 200,
  
  /// <remarks/>
  gamma = 300,
}

My problem with this is that the numerical values of these enums have been stored in a database. In a next version, the enum in the XSD has changed, with new enum values generated by xsd.exe in between the previous ones. For example:

[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.8.3928.0")]
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://mariusbancila.ro/demo/2.0")]
public enum statusCode {
  
  /// <remarks/>
  none,
  
  /// <remarks/>
  alpha,
  
  /// <remarks/>
  beta,
  
  /// <remarks/>
  delta, // this is now 3

  /// <remarks/>
  gamma, // this used to be 3, now it's 4
}

And this messed up the handling of the stored numerical values in other parts of the system.

Therefore, I'm looking for a way to generate the C# code with the numerical values. I know I can manually edit the result, but that is error-prone and requires manual intervention each time the XSD changes, which is something I definitely want to avoid.