Working with "Paths" in C#

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ProTestService

{

    class Program

    {

         static void Main(string[] args)

         {

             string path = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);

             path = Path.Combine(path.Replace("file:\\", ""), "test.txt");

             using (StreamWriter newTask = new StreamWriter(path, true))

             {

                  newTask.WriteLine("ProTestService calisma zamani--> " +DateTime.Now.ToString());

             }

         }

     }

}