How to ADD and USE Master Page in ASP.NET

Step 1:

Make a new Web Project

Step 2:

Click on the Solution Explorer and Add New Item and Select the Master Page

Step 3:

Put a content on your Master Page

Step 4: On the script section of the DEFAULT.ASPX put the MasterPageFile="~/MasterPage.master" tag and delete the html section of the file

Now your ready to go...