Повторное открытие предварительного просмотра

 private void button1_Click(object sender, EventArgs e)
 {
   
     if (bunifuCheckBox24.Checked)
     {
 
         if (!printPreviewOpen) // Check if print preview is already open
         {
             PrintDocument printDocument = new PrintDocument();
             printDocument.PrintPage += new PrintPageEventHandler(PrintDocument_PrintPage);
 
             PrintPreviewDialog printPreviewDialog = new PrintPreviewDialog();
             printPreviewDialog.Document = printDocument;
 
             // Add an event handler for FormClosed to reset the flag
             printPreviewDialog.FormClosed += (sender2, args2) =>
             {
                 printPreviewOpen = false;
             };
 
             printPreviewDialog.ShowDialog();
       
         }
     }
     else {
         if (bunifuCheckBox12.Checked) // Check if print preview is already open
         {
             PrintDocument printDocument = new PrintDocument();
             printDocument.PrintPage += new PrintPageEventHandler(PrintDocument_PrintPage2);
 
             PrintPreviewDialog printPreviewDialog = new PrintPreviewDialog();
             printPreviewDialog.Document = printDocument;
 
             // Add an event handler for FormClosed to reset the flag
             printPreviewDialog.FormClosed += (sender2, args2) =>
             {
                 printPreviewOpen = false;
             };
 
             printPreviewDialog.ShowDialog();
 
         }
         else {
             PrintDocument printDocument = new PrintDocument();
             printDocument.PrintPage += new PrintPageEventHandler(PrintDocument_PrintPage3);
 
             PrintPreviewDialog printPreviewDialog = new PrintPreviewDialog();
             printPreviewDialog.Document = printDocument;
 
             // Add an event handler for FormClosed to reset the flag
             printPreviewDialog.FormClosed += (sender2, args2) =>
             {
                 printPreviewOpen = false;
             };
 
             printPreviewDialog.ShowDialog();
         }
     }
 
 }