In the New Project dialog box, expand the Other Project Types node in the left pane and select Visual Studio Solutions. In the right pane, select Blank Solution.
In the Name: textbox, type Chapter7.MailBox and in the Location: textbox select a path from the drop-down box or click on the Browse... button to locate a path:
Click OK.
Now your Solution Explorer (Ctrl + Alt + L) should look like this:
Now, click the right mouse button on the Chapter7.MailBox ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.