C# 7 and .NET Core 2.0 Blueprints

Saving a selected book to a storage space

The following code basically updates the book list in the selected storage space if it already contains the specific book (after confirming with the user). Otherwise, it will add the book to the book list as a new book:

private void UpdateStorageSpaceBooks(int storageSpaceId) 
{ 
    try 
    { 
        int iCount = (from s in spaces 
                      where s.ID == storageSpaceId 
                      select s).Count(); 
        if (iCount > 0) // The space will always exist 
        { 
            // Update 
            StorageSpace existingSpace = (from s in spaces 
              where s.ID == storageSpaceId select s).First(); 
 
            List<Document> ebooks = existingSpace.BookList; 
 
            int iBooksExist = (ebooks != null) ? (from b in ebooks 
              where $"{b.FileName}".Equals($" {txtFileName.Text.Trim()}") select b).Count() : 0; if ...