编辑“︁C Sharp 异常记录”︁（章节）

== 详细实现方法 ==

=== 1. 结构化日志记录 ===
推荐使用 <code>ILogger</code> 接口（Microsoft.Extensions.Logging）实现结构化记录：

<syntaxhighlight lang="csharp">
using Microsoft.Extensions.Logging;

class Program
{
    static void Main()
    {
        ILoggerFactory factory = LoggerFactory.Create(builder => 
            builder.AddFile("app.log"));
        
        ILogger logger = factory.CreateLogger<Program>();
        
        try
        {
            File.ReadAllText("nonexistent.txt");
        }
        catch (FileNotFoundException ex)
        {
            logger.LogError(ex, "文件未找到: {FileName}", "nonexistent.txt");
        }
    }
}
</syntaxhighlight>

日志文件内容示例：
<pre>
2023-11-20 14:30:45 [Error] 文件未找到: nonexistent.txt
System.IO.FileNotFoundException: Could not find file '...'
   at System.IO.File.ReadAllText(String path)
</pre>

=== 2. 异常上下文增强 ===
通过 <code>Exception.Data</code> 属性添加上下文信息：

<syntaxhighlight lang="csharp">
try
{
    var user = GetUserById("invalid_id");
}
catch (Exception ex)
{
    ex.Data["UserId"] = "invalid_id";
    ex.Data["RequestTime"] = DateTime.UtcNow;
    logger.LogError(ex, "用户查询失败");
}
</syntaxhighlight>