public void CreateAttachments(List <string> paintingIDs)
{
PaintingApiService ServicePainting = new PaintingApiService();
//Purpose of LINQ: Get list of paintings and a list of selected painting ids and fill the list of mail.Attachments
ServicePainting //Service For Paintings
.GetPaintings() //Will Get A List of Paintings From API
.Where(a => paintingIDs //From paintingIDs
.Select(int.Parse) //Convert Everything To INT
.ToList() //Convert To List
.Contains(a.PaintingId)) //Filter Resault With The Paintings id From API
.Select(b => b.ImageUrl) //Keep Only The Img Source
.Select(c => new Attachment(LocalUrl + c)) //Create Attachment With Local URL For Every Img Scource in List
.ToList() //Convert To List, Nessesary To Add a ForEach Later
.ForEach(d => { mail.Attachments.Add(d); }); //Add Each Attachment Created Above, Into the List Of Attachments in mail
//LINQ returns Null...so no need to save a var
}
