ACAT.Extensions.Default.FunctionalAgents.FileBrowserAgent.FileBrowserScanner.includeFile C# (CSharp) Method

        private bool includeFile(FileInfo fileInfo, String[] includeExtension, String[] excludeExtension, String filter)
        {
            var extension = fileInfo.Extension.ToLower();
            bool add = true;

            if (String.IsNullOrEmpty(extension))
            {
                extension = "*.";
            }
            else if (extension.Length > 0 && extension[0] == '.')
            {
                extension = extension.Substring(1).ToLower();
            }

            if (!String.IsNullOrEmpty(filter) &&
                !fileInfo.Name.StartsWith(filter, StringComparison.InvariantCultureIgnoreCase))
            {
                add = false;
            }

            if (add)
            {
                if ((excludeExtension.Length > 0 &&
                    excludeExtension.Contains(extension)) || (includeExtension.Length > 0 &&
                    !includeExtension.Contains(extension)))
                {
                    add = false;
                }
            }

            return add;
        }