using System;

using System.Diagnostics;

using System.Linq;

using System.Reflection;

​

namespace Library

{

    public class TestClass

    {

        public string Context { get; private set; }

        public TestClass()

        {

            var stack = new StackTrace();

            var frame = stack.GetFrames().First(f => !f.GetMethod().ReflectedType.FullName.StartsWith("Library."));

            Context = frame.GetMethod().ReflectedType.FullName + "." + frame.GetMethod().Name;

        }

    }

    public static class TestClassBuilder

    {

        public static TestClass BuildClass()

        {

            return new TestClass();

        }

    }

}

​

namespace App

{

    public class LibraryService

    {

        public static string GetLibraryContext()

        {

            var tc = Library.TestClassBuilder.BuildClass();

            return tc.Context;

        }

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(App.LibraryService.GetLibraryContext());

        // => App.LibraryService.GetLibraryContext

    }

}

​