How can i copy-paste  data in richtextbox to an excel sheet?
                            
                         
                        
                     
                 
                
                    Hallo,
 
I have a Form. In this form are a richtextbox with a few data in many rows (lines). I want to copy and paste all data in richtextbox in an excel sheet with a button.I can copy and paste all richtextbox data in an excel sheet but i have a problem. 
data in richtextbox are there many rows (lines). When i click the button bynCopyPasteToExcel it works but all data are in cell A1
How can i copy-paste all data in richtextbox lines in excel ?
 
 code is here : 
  private void btnCopyPasteToExcel_Click(object sender, EventArgs e)
 
   {
   Microsoft.Office.Interop.Excel.Application uygulama = new Microsoft.Office.Interop.Excel.Application();
   uygulama.Visible = true;
   Microsoft.Office.Interop.Excel.Workbook kitap = uygulama.Workbooks.Add(System.Reflection.Missing.Value);
   Microsoft.Office.Interop.Excel.Worksheet sayfa1 = (Microsoft.Office.Interop.Excel.Worksheet)kitap.Sheets[1];
   Microsoft.Office.Interop.Excel.Range alan = (Microsoft.Office.Interop.Excel.Range)sSheets.Cells[1,1];
   alan.Value2 = richTextBox1.Text;
   }
Thanks for help...