OpenTween.MediaSelector.MakeAvailableServiceText C# (CSharp) Method

        private string MakeAvailableServiceText(string ext, long fileSize)
        {
            var text = string.Join(", ",
                ImageServiceCombo.Items.Cast<string>()
                    .Where(serviceName =>
                        !string.IsNullOrEmpty(serviceName) &&
                        this.pictureService[serviceName].CheckFileExtension(ext) &&
                        this.pictureService[serviceName].CheckFileSize(ext, fileSize)));

            if (string.IsNullOrEmpty(text))
                return Properties.Resources.PostPictureWarn6;

            return text;
        }