미리 예약된 attribute 로 코드 정보 받아오기

public void DoProcessing()
{
    TraceMessage("Something happened.");
}

public void TraceMessage(string message,
        [CallerMemberName] string memberName = "",
        [CallerFilePath] string sourceFilePath = "",
        [CallerLineNumber] int sourceLineNumber = 0)
{
    Trace.WriteLine("message: " + message);
    Trace.WriteLine("member name: " + memberName);
    Trace.WriteLine("source file path: " + sourceFilePath);
    Trace.WriteLine("source line number: " + sourceLineNumber);
}

// Sample Output:
//  message: Something happened.
//  member name: DoProcessing
//  source file path: c:\Visual Studio Projects\CallerInfoCS\CallerInfoCS\Form1.cs
//  source line number: 31




namespace System.Runtime.CompilerServices {
    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = false)]
    public class CallerMemberNameAttribute : Attribute {
    }

    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = false)]
    public class CallerFilePathAttribute : Attribute {
    }

    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = false)]
    public class CallerLineNumberAttribute : Attribute {
    }
}

docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/attributes/

Attributes (C#)

docs.microsoft.com/ko-kr/dotnet/csharp/language-reference/attributes/caller-information

C# 예약된 특성: 호출자 정보 추적

docs.microsoft.com/ko-kr/dotnet/api/system.attributetargets?view=net-5.0

AttributeTargets 열거형 (System)