To generate content from master page
  1. In the Text Editor, position the caret within .aspx file.
  2. On the main menu, choose ReSharper | Edit | Generate Code, or press Alt+Insert.
  3. From the Generate pop-up menu, select Content for Masterpage.
  4. On the Generate content for masterpage's content placeholder page of the Generate wizard, select ContentPlaceHolder controls from a master page to generate related Content controls for a content page.
    Generate Content from Master Page
    Image 1:
  5. As an option, use Copy default content, if ContentPlaceHolder control contains default content and you want to copy it to the content page.
  6. Click Finish to complete the wizard.