C# 读取类Class注释
https://www.cnblogs.com/shanfeng1000/p/14972515.html
友好的注释能提高代码的可读性，几乎所有的编程语言都支持注释。
在C#中，注释不是可执行代码的一部分，因此注释不会被编译到程序集中去，但是我们可以提取注释【右键项目】-【属性】-【生成】-【输出】-【Xml文档文件】：
如果勾选了输出注释，那么VS在没有注释的方法、类型、属性等地方将会抛出警告，提醒添加注释，而添加1591代码可以取消这种无注释警告。
一般时候，我们并不会在代码中操作注释，但是如果需要，我们可以从这个生成的xml文件中去获取注释，swagger也是这么做的。
首先，创建一个辅助类：
/// <summary>
/// 注释辅助类
/// </summary>
public class XmlCommentHelper
{
private static Regex RefTagPattern = new Regex(@"<(see|paramref) (name|cref)=""([TPF]{1}:)?(?<display>.+?)"" ?/>");
private static Regex CodeTagPattern = new Regex(@"<c>(?<display>.+?)</c>");
private static Regex ParaTagPattern = new Regex(@"<para>(?<display>.+?)</para>", RegexOptions.Singleline);
List<XPathNavigator> navigators = new List<XPathNavigator>();
/// <summary>
/// 从当前dll文件中加载所有的xml文件
/// </summary>
public void LoadAll()
{
var files = Directory.GetFiles(Directory.GetCurrentDirectory());
foreach (var file in files)
{
if (string.Equals(Path.GetExtension(file), ".xml", StringComparison.OrdinalIgnoreCase))
{
Load(file);
}
}
}
/// <summary>
/// 从xml中加载
/// </summary>
/// <param name="xmls"></param>
public void LoadXml(params string[] xmls)
{
foreach (var xml in xmls)
{
Load(new MemoryStream(Encoding.UTF8.GetBytes(xml)));
}
}
/// <summary>
/// 从文件中加载
/// </summary>
/// <param name="xmlFiles"></param>
public void Load(params string[] xmlFiles)
{
foreach (var xmlFile in xmlFiles)
{
var doc = new XPathDocument(xmlFile);
navigators.Add(doc.CreateNavigator());
}
}
/// <summary>
/// 从流中加载
/// </summary>
/// <param name="streams"></param>
public void Load(params Stream[] streams)
{
foreach (var stream in streams)
{
var doc = new XPathDocument(stream);
navigators.Add(doc.CreateNavigator());
}
}
/// <summary>
/// 读取类型中的注释
/// </summary>
/// <param name="type">类型</param>
/// <param name="xPath">注释路径</param>
/// <param name="humanize">可读性优化(比如：去掉xml标记)</param>
/// <returns></returns>
public string GetTypeComment(Type type, string xPath = "summary", bool humanize = true)
{
var typeMemberName = GetMemberNameForType(type);
return GetComment(typeMemberName, xPath, humanize);
}
/// <summary>
/// 读取字段或者属性的注释
/// </summary>
/// <param name="fieldOrPropertyInfo">字段或者属性</param>
/// <param name="xPath">注释路径</param>
/// <param name="humanize">可读性优化(比如：去掉xml标记)</param>
/// <returns></returns>
public string GetFieldOrPropertyComment(MemberInfo fieldOrPropertyInfo, string xPath = "summary", bool humanize = true)
{
var fieldOrPropertyMemberName = GetMemberNameForFieldOrProperty(fieldOrPropertyInfo);
return GetComment(fieldOrPropertyMemberName, xPath, humanize);
}
/// <summary>
/// 读取方法中的注释
/// </summary>
/// <param name="methodInfo">方法</param>
/// <param name="xPath">注释路径</param>
/// <param name="humanize">可读性优化(比如：去掉xml标记)</param>
/// <returns></returns>
public string GetMethodComment(MethodInfo methodInfo, string xPath = "summary", bool humanize = true)
{
var methodMemberName = GetMemberNameForMethod(methodInfo);
return GetComment(methodMemberName, xPath, humanize);
}
/// <summary>
/// 读取方法中的返回值注释
/// </summary>
/// <param name="methodInfo">方法</param>
/// <param name="humanize">可读性优化(比如：去掉xml标记)</param>
/// <returns></returns>
public string GetMethodReturnComment(MethodInfo methodInfo, bool humanize = true)
{
return GetMethodComment(methodInfo, "returns", humanize);
}
/// <summary>
/// 读取参数的注释
///