In this tutorial, we will cover what you need to do to add a new web form in Visual Studio:
Open the Web Form project in Visual Studio.
Right-click on the project and select Add -> New Item.
Select Web Form from the list of templates.
Name your web form "New Web Form" and click OK.
Right-click on the newly created web form and select Edit HTML Source.
Enter the following code into your HTML source code file (this is an example of how to enter code for a simple textbox):