Checking if a word in a Word document Paragraphs text is bold Asp.net c#

Microsoft.Office.Interop.Word.Document doc = wordApp.Documents.OpenNoRepairDialog(FileName: Filepath, ConfirmConversions: false, ReadOnly: true, AddToRecentFiles: false, NoEncodingDialog: true);

          

Microsoft.Office.Interop.Word.Range r = doc.Paragraphs[par].Range; 

     if (r.Bold == -1)

        {

            string ptext=r.Text.Trim();

        }

/// Result

This is bold