Retrieves full path, regardless where is executing directory. It is essential method for testing and when running services under system32 path.

PathHelper.cs

    public static class PathHelper
    {
        private static readonly string DataPath;

        static PathHelper()
        {
            var assembly = Assembly.GetAssembly(typeof(PathHelper));
            var codebase = assembly.CodeBase.Replace("file:///", "");
            var baseDir = Path.GetDirectoryName(codebase);
            DataPath = baseDir;
        }

        /// <summary>
        /// Retrieves full path, regardless where is executing directory.
        /// It is essential method for testing and when running services under system32 path.
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        public static string GetFullPath(string filePath)
        {
            return Path.Combine(DataPath, filePath);
        }
    }