Validating XML with XSL in .Net Core

Here I already explained once how it can be done in .Net Framework, with Saxon-Se, and now here is experimental example in .Net Core.

Install NuGet package SaxonHE12s9apiExtensions.

In .csproj add something like:

<ItemGroup>
	<PackageReference Include="IKVM.Maven.Sdk" Version="1.8.2"/>
	<MavenReference Include="net.sf.saxon:Saxon-HE" version="12.5"/>
	<PackageReference Include="SaxonHE12s9apiExtensions" Version="12.5.9.4"/>
</ItemGroup>

Use this method to return result as a string which later you can convert to XML as I already explained here:

using net.sf.saxon.s9api;
using net.liberty_development.SaxonHE12s9apiExtensions;
...
string ValidateXmlFile(string xmlFile, string xslFile)
{
    Processor processor = new Processor();
    DocumentBuilder builder = processor.newDocumentBuilder();

    XsltTransformer xsltTransformer = processor.newXsltCompiler().Compile(new Uri(xslFile)).load();
    var inputNode = builder.Build(new Uri(xmlFile));
    xsltTransformer.setInitialContextNode(inputNode);
    using var stringWriter = new StringWriter();
    Serializer serializer = processor.NewSerializer(stringWriter);
    xsltTransformer.setDestination(serializer);
    xsltTransformer.transform();
    return stringWriter.ToString();
}

Example download from here.