How to get the Numbered Headings as in word using c# code.

See I have 5 buttons Heading 1, Heading 2, Heading 3,  Heading 4, Heading 5.

 

I want output like

 

1. heading
    1.1. heading
    1.2. heading
        1.2.1. heading
        1.2.2. heading
2. heading
    2.1. heading
    2.2. heading
        2.2.1. heading
        2.2.2 heading
    2.3. heading
3. heading
4. heading
    4.1. heading
        4.1.1 heading

Up to button 5 

for (int i = 1; i <= 5; i++)
{
Microsoft.Office.Interop.Word.Style style = doc1.Styles["Heading " + i];
style.LinkToListTemplate(numberedTemplate, i);
}

I am using ribbion.cs file my code. But it is refelecting to Text heading insted of Numbered heading

 

 

Application app = Globals.ThisAddIn.Application;
Microsoft.Office.Interop.Word.Document doc1 = app.ActiveDocument;
Selection wordSelection = Globals.ThisAddIn.Application.Selection;
ListGallery gallery = wordSelection.Application.ListGalleries[WdListGalleryType.wdOutlineNumberGallery];
ListTemplate numberedTemplate = gallery.ListTemplates[2]; 

@Chetan,

 

   try this,

   

       string number = "";

 

      private void button1_Click(......)

      {

          if(number == "")

               number = "1";

          else

               number = number + ".1"; 

 

          messageBox.Show(number); 

      } 

 

 

         write this button code in every button_click.