using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TestConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            TestClass tc = new TestClass();
            tc.Method1(2017, 1);
        }
    }

    class TestClass
    {
        public TestClass()
        {
        }

        public void Method1(int DatabaseYear, int DatabaseMonth)
        {
            string fileName = "test";
            string folder = "testFolder";
            string errorMessage = "Failed to copy";

            // this is the line
            string s = $"Error while copying {fileName} to {Path.Combine(folder, $"Data{DatabaseYear}{DatabaseMonth:D2}01.dat")}. {errorMessage}";
            Console.WriteLine(s);
            Console.ReadLine();
        }

        private void Method2()
        {

        }
    }
}