System.IO.Win32FileSystem.GetCurrentDirectory C# (CSharp) Méthode

        public override string GetCurrentDirectory()
        {
            StringBuilder sb = StringBuilderCache.Acquire(Interop.Kernel32.MAX_PATH + 1);
            if (Interop.Kernel32.GetCurrentDirectory(sb.Capacity, sb) == 0)
                throw Win32Marshal.GetExceptionForLastWin32Error();
            String currentDirectory = sb.ToString();
            // Note that if we have somehow put our command prompt into short
            // file name mode (i.e. by running edlin or a DOS grep, etc), then
            // this will return a short file name.
            if (currentDirectory.IndexOf('~') >= 0)
            {
                int r = Interop.Kernel32.GetLongPathName(currentDirectory, sb, sb.Capacity);
                if (r == 0 || r >= Interop.Kernel32.MAX_PATH)
                {
                    int errorCode = Marshal.GetLastWin32Error();
                    if (r >= Interop.Kernel32.MAX_PATH)
                        errorCode = Interop.Errors.ERROR_FILENAME_EXCED_RANGE;
                    if (errorCode != Interop.Errors.ERROR_FILE_NOT_FOUND &&
                        errorCode != Interop.Errors.ERROR_PATH_NOT_FOUND &&
                        errorCode != Interop.Errors.ERROR_INVALID_FUNCTION &&  // by design - enough said.
                        errorCode != Interop.Errors.ERROR_ACCESS_DENIED)
                        throw Win32Marshal.GetExceptionForWin32Error(errorCode);
                }
                currentDirectory = sb.ToString();
            }
            StringBuilderCache.Release(sb);

            return currentDirectory;
        }