using System;

using System.Runtime.CompilerServices;

​

Log("發生錯誤");

​

void Log(

        string msg,

        [CallerMemberName] string caller = null, 

        [CallerFilePath] string filePath = null, 

        [CallerLineNumber] int lineNum = 0) 

{

    Console.WriteLine($"{msg}, 呼叫端: {caller}, 檔案: {filePath}, 程式行號: {lineNum}");

}