How to read Microsoft Word document contents using C#/.NET?

  public static string GetTextFromWordDocument(object filePath)
  {
      var filePathAsString = filePath as string;
      if (string.IsNullOrEmpty(filePathAsString))
      {
          throw new ArgumentNullException("filePath");
      }
   
      if (!File.Exists(filePathAsString))
      {
          throw new FileNotFoundException("Could not find file", filePathAsString);
      }
   
      var textFromWordDocument = string.Empty;
      Word.Application wordApp = new Word.Application();
      Word.Document wordDocument = null;
      Word.Range wordContentRange = null;
   
      try
      {
          wordDocument = wordApp.Documents.Open(ref filePath, Missing.Value, true);
          wordContentRange = wordDocument.Content;
          textFromWordDocument = wordContentRange.Text;
      }
      catch
      {
          // handle the COM exception
      }
      finally
      {
          if (wordDocument != null) { wordDocument.Close(false); }
          if (wordApp != null) { wordApp.Quit(false); }
                  
          ReleaseComObject(wordDocument);
          ReleaseComObject(wordContentRange);
          ReleaseComObject(wordDocument);
          ReleaseComObject(wordApp);
      }
   
      return textFromWordDocument;
  }