使用 LINQ to XML，.NET 让生成 XML 文件变得和直接写 XML 一样轻松

var root = new XElement("Root",
    new XAttribute("Attribute", "Walterlv"),
    new XElement("Node", "Content")
);

<Root Attribute="Walterlv">
  <Node>Content</Node>
</Root>

var xmlns = "http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd";
var root = new XElement("package",
    new XAttribute(XNamespace.Xmlns.ToString(), xmlns),
    new XElement("metadata",
        new XElement("id", "MSTestEnhancer"),
        new XElement("version", "1.6.0"),
        new XElement("authors", "walterlv"),
        new XElement("owners", "walterlv"),
        new XElement("requireLicenseAcceptance", "false"),
        new XElement("licenseUrl", "https://github.com/dotnet-campus/MSTestEnhancer/blob/master/LICENSE"),
        new XElement("projectUrl", "https://dotnet-campus.github.io/mstest-enhancer"),
        new XElement("iconUrl", "https://dotnet-campus.github.io/mstest-enhancer/icon.png"),
        new XElement("description", "MSTestEnhancer helps you to write unit tests without naming any method. You can write method contract descriptions instead of writing confusing test method name when writing unit tests."),
        new XElement("releaseNotes", "Support passing null into WithArgument method."),
        new XElement("copyright", "Copyright (c) 2018 dotnet职业技术学院"),
        new XElement("repository",
            new XAttribute("type", "git"),
            new XAttribute("url", "https://github.com/dotnet-campus/MSTestEnhancer.git")),
        new XElement("dependencies", dependencies.Select(group => new XElement("group",
            new XAttribute("targetFramework", group.Key), group.Value.Select(x =>
                new XElement("dependency",
                    new XAttribute("id", x.id),
                    new XAttribute("version", x.version),
                    new XAttribute("exclude", x.exclude)))))
        )
    ));
var document = new XDocument(root);
document.Save(@"C:\Users\walterlv\Desktop\Walterlv.Demo.nuspec");

var dependencies = new Dictionary<string, (string id, string version, string exclude)[]>
{
    [".NETFramework4.5"] = new[]
    {
        ("MSTest.TestFramework", "1.2.0", "Build,Analyzers"),
        ("System.ValueTuple", "4.4.0", "Build,Analyzers"),
    },
    [".NETFramework4.7"] = new[]
    {
        ("MSTest.TestFramework", "1.2.0", "Build,Analyzers"),
    },
    [".NETStandard2.0"] = new[]
    {
        ("MSTest.TestFramework", "1.2.0", "Build,Analyzers"),
    }
};

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
  <metadata>
    <id>MSTestEnhancer</id>
    <version>1.6.0</version>
    <authors>walterlv</authors>
    <owners>walterlv</owners>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <licenseUrl>https://github.com/easiwin/MSTestEnhancer/blob/master/LICENSE</licenseUrl>
    <projectUrl>https://easiwin.github.io/mstest-enhancer</projectUrl>
    <iconUrl>https://easiwin.github.io/mstest-enhancer/icon.png</iconUrl>
    <description>MSTestEnhancer helps you to write unit tests without naming any method. You can write method contract descriptions instead of writing confusing test method name when writing unit tests.</description>
    <releaseNotes>Support passing null into WithArgument method.</releaseNotes>
    <copyright>Copyright (c) 2018 dotnet职业技术学院</copyright>
    <repository type="git" url="https://github.com/easiwin/MSTestEnhancer.git" />
    <dependencies>
      <group targetFramework=".NETFramework4.5">
        <dependency id="MSTest.TestFramework" version="1.2.0" exclude="Build,Analyzers" />
        <dependency id="System.ValueTuple" version="4.4.0" exclude="Build,Analyzers" />
      </group>
      <group targetFramework=".NETFramework4.7">
        <dependency id="MSTest.TestFramework" version="1.2.0" exclude="Build,Analyzers" />
      </group>
      <group targetFramework=".NETStandard2.0">
        <dependency id="MSTest.TestFramework" version="1.2.0" exclude="Build,Analyzers" />
      </group>
    </dependencies>
  </metadata>
</package>