xml操作-帮个忙吧，各位大虾！

<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProductVersion>8.0.50727</ProductVersion>
    <SchemaVersion>2.0</SchemaVersion>
    <ProjectGuid>{606D02C8-493F-4721-B714-0EC1A040A3EC}</ProjectGuid>
    <OutputType>Library</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>Ctrip.Business.FlightBusiness</RootNamespace>
    <AssemblyName>Ctrip.Business.FlightBusiness</AssemblyName>
    <SccProjectName>"%24/CtripSolution/BusinessLayer/FlightFactory", PAAAAAAA</SccProjectName>
    <SccLocalPath>.</SccLocalPath>
    <SccAuxPath>
    </SccAuxPath>
    <SccProvider>MSSCCI:Microsoft Visual SourceSafe</SccProvider>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\Release\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="System" />
    <Reference Include="System.Data" />
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Properties\AssemblyInfo.cs" />
  </ItemGroup>
  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
       Other similar extension points exist, see Microsoft.Common.targets.
  <Target Name="BeforeBuild">
  </Target>
  <Target Name="AfterBuild">
  </Target>
  -->
</Project>

把里面所有的Reference节点去掉，然后加一条
<Reference Include="System.IO" />
应该如何写呀～～～～～ --------------------编程问答-------------------- XmlDocument doc = new XmlDocument();
doc.Load(@"e:\1.xml");
XmlNodes nodes = doc.SelectNodes("//Reference");
XmlNode nodeParent = null;
foreach(XmlNode node in nodes)
{
   nodeParent = node.ParentNode;
   nodeParent.RemoveChild(node);
}

XmlElement ele = doc.CreateElement("Reference");
ele.Attributes["Include"] = "System.IO";
nodeParent.AppendChild(ele);
doc.Save(@"e:\1.xml"); --------------------编程问答-------------------- 顶ls的。太熟练了 。呵呵

补充：.NET技术 ,  C#