1. 创建被调用的类：

using System;
using System.Diagnostics;
using System.Reflection;

namespace Test
{
    public class Util
    {
        public void GetName()
        {
            Console.WriteLine("被调用者信息：");
            Type t = GetType();
            Console.WriteLine(t.Name);
            Console.WriteLine(t.FullName);
            

            StackTrace stackTrace = new StackTrace(true);
            MethodBase methodBase = stackTrace.GetFrame(1).GetMethod();

            Console.WriteLine(MethodBase.GetCurrentMethod().DeclaringType.Namespace);
            Console.WriteLine(MethodBase.GetCurrentMethod().DeclaringType.FullName);
            Console.WriteLine(MethodBase.GetCurrentMethod().Name);

            Console.WriteLine("\n调用者信息：");
            Console.WriteLine(methodBase.DeclaringType.Namespace);
            Console.WriteLine(methodBase.DeclaringType.Name);
            Console.WriteLine(methodBase.Name);
        }
    }
}

2. 创建调用者，也就是Main函数

using System;
using Test;

namespace TestCSharp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var u = new Util();
            u.GetName();
            Console.ReadLine();
        }
    }
}

3. 输出结果

被调用者信息：
Util
Test.Util
Test
Test.Util
GetName

调用者信息：
TestCSharp
Program
Main

参考：

https://blog.csdn.net/weixin_45581482/article/details/117032083