using System.Xml; 
XmlDocument インスタンス名 = new XmlDocument(); 
XMLDocument インスタンス名.Load(ファイル名); 

#using <mscorlib.dll>
#using <System.dll>
#using <System.Data.dll>
#using <System.Xml.dll> 
System::Xml::XmlDataDocument^ myXmlDoc=gcnew System::Xml::XmlDataDocument();
myXmlDoc->Load(doc);
myXmlDoc->Save(Console::Out);

myXmlDoc->Save(Console::Out);

XmlWriter^ writer;
XmlWriterSettings^ settings;
try{
    settings = gcnew XmlWriterSettings();
    settings->Indent = true;
    settings->IndentChars = ("\t");
    settings->OmitXmlDeclaration = true;
    writer = XmlWriter::Create("fname.xml", settings); // static call
    xml->Save(writer);
} catch (ArgumentNullException^ ex){
    Console::WriteLine(ex->ToString());
} catch (ArgumentException^ ex){
    Console::WriteLine(ex->ToString());
} catch (XmlException^ ex){
    Console::WriteLine(ex->ToString());
} finally {
    if(writer != nullptr) writer->Close();
    delete settings;
}

XMLReadterとは、DOM を生成することなく XML 文書を読み込む機能です。また、XMLWriter とは、DOM を生成することなく XML 文書をファイルに出力する機能です。

    XmlNode^ node;
    XmlElement^ root;
    XmlElement^ elem;
    XmlElement^ elem2;
    XmlAttribute^ attr;
    XmlAttributeCollection^ attrColl;
    String^ xmlns = "http://schemas.microsoft.com/developer/msbuild/2003";

    // Create a new element node.
    try {
        // <Project>
        node = xml->CreateNode( XmlNodeType::Element, "Project", xmlns);
        xml->AppendChild(node);
        root = xml->DocumentElement;

        attrColl = xml->DocumentElement->Attributes;

        attr = xml->CreateAttribute( "DefaultTargets" );
        attr->Value = "Build";
        attrColl->Append( attr );
        // <PropertyGroup>
        node = xml->CreateNode( XmlNodeType::Element,"PropertyGroup", xmlns );

        elem = xml->CreateElement("AssemblyName",xmlns);
        elem ->InnerText = mc->pname;
        node -> AppendChild(elem);

        elem = xml->CreateElement("TargetType",xmlns);
        elem ->InnerText = mc->targetType;
        node -> AppendChild(elem);

        root->AppendChild( node );

        // Import
        node = xml->CreateNode( XmlNodeType::Element, "Import", xmlns );

        attrColl = node->Attributes;
        attr = xml->CreateAttribute( "Project" );
        attr->Value = "$(MSBuildBinPath)\\Microsoft.CSharp.targets";
        attrColl->Append( attr );

        root->AppendChild( node );

// <Compile>
        elem = xml->CreateElement("Compile",xmlns);
        attrColl = elem->Attributes;
        attr = xml->CreateAttribute( "Include" );
        attr->Value = mc->xaml_appdef +".cs";
        attrColl->Append( attr );

        elem2 = xml->CreateElement("DependentUpon",xmlns);
        elem2 ->InnerText = mc->xaml_appdef;
        elem -> AppendChild(elem2);

        elem2 = xml->CreateElement("SubType",xmlns);
        elem2 ->InnerText = "Code";
        elem -> AppendChild(elem2);

        node -> AppendChild(elem);

    } catch (ArgumentException^ ex){
        Console::WriteLine(ex->ToString());
    } catch (NullReferenceException^ ex){
        Console::WriteLine(ex->ToString());
    } catch (XmlException^ ex){
        Console::WriteLine(ex->ToString());
    }