CallerArgumentExpression in C#

In C#, a CallerArgumentExpression is an attribute that allows you to pass information about the caller to a method or property. This can be useful for logging or debugging purposes. Here's an example of how to use the CallerArgumentExpression attribute:

using System;
using System.Runtime.CompilerServices;

public class Example
{
    public void Log(string message, [CallerMemberName] string callerMemberName = "")
    {
        Console.WriteLine($"Caller member: {callerMemberName}, Message: {message}");
    }

    public void SomeMethod()
    {
        // Log with the caller's method name
        Log("This is a log message from SomeMethod");
    }

    public static void Main()
    {
        Example example = new Example();
        example.SomeMethod();
    }
}

In this example, the Log method has a parameter decorated with the [CallerMemberName] attribute. This attribute allows you to omit passing the callerMemberName parameter explicitly when calling the Log method, and it will automatically use the name of the calling method. The SomeMethod method calls the Log method and passes a log message. The Main method creates an instance of the Example class and calls SomeMethod, which in turn calls the Log method with the name of the calling method.