/// <summary>
 /// Displays purchase documents that were not found/moved
 /// </summary>
 private void DisplayMissingDocsButton_Click(object sender, EventArgs e)
 {
     if (InvoiceContent != null)
     {
         DisplayMissingDocumentsText(InvoiceContent.Where(d => d.FileWasMoved == false).ToList());
     }
 }
        /// <summary>
        /// Moves the purchase invoices to the selected folder
        /// </summary>
        private void MovePurchasingInvoicesButton_Click(object sender, EventArgs e)
        {
            if (AllProductInvoices != null && InvoiceContent != null && SearchDirectoryPath != "" && MoveFilesDirectoryPath != "")
            {
                fileHandler.MoveDocuments(AllProductInvoices, InvoiceContent, SearchDirectoryPath, MoveFilesDirectoryPath);
            }

            if (InvoiceContent != null)
            {
                DisplayMissingDocumentsText(InvoiceContent.Where(d => d.FileWasMoved == false).ToList());
            }
        }