C#关闭时向跟踪侦听器添加页脚

public class CustomTraceListener : TraceListener
{
    public override void Write(string message)
    {
        // 在消息中添加页脚
        base.Write(message + " (Footer)");
    }

    public override void WriteLine(string message)
    {
        // 在消息中添加页脚
        base.WriteLine(message + " (Footer)");
    }
}

 <trace>
   <listeners>
      <add name="CustomTraceListener" type="MyNamespace.CustomTraceListener, MyAssembly" />
    </listeners>
  </trace>
</system.diagnostics>

System.Diagnostics.Trace.WriteLine("Hello, World!");