To create a webform in ASP.NET without getting IIS Express error, you can follow these steps:

1. Open Visual Studio and create a new ASP.NET Web Application project.
2. In the project template selection window, choose the Empty option and check the Web Forms checkbox. Click OK to create the project.
3. Right-click on the project in the Solution Explorer and select Add > New Item.
4. In the Add New Item window, select Web Form and provide a name for the form. Click Add to add the web form to the project.
5. Open the newly created web form (.aspx file) in the designer view.
6. In the designer view, drag and drop HTML controls from the Toolbox onto the form to create the desired user interface. You can use controls like TextBox, Button, Label, etc.
7. Implement the required logic in the code-behind file (.aspx.cs) to handle the form submission and perform any necessary processing.

• To access the code-behind file, right-click on the web form in the Solution Explorer and select View Code.

1. Build the project by clicking on the Build menu and selecting Build Solution. Fix any compilation errors if encountered.
2. Set the web form as the startup page for the project. Right-click on the web form in the Solution Explorer and select Set as Start Page.
3. Run the project by pressing F5 or by clicking on the Debug menu and selecting Start Debugging.

If you encounter any IIS Express errors during this process, it may be due to configuration issues. You can try the following steps to resolve them:

• Make sure IIS Express is installed on your machine. If not, you can download and install it from the Microsoft website.
• Check the project’s properties by right-clicking on the project in the Solution Explorer and selecting Properties.
• In the project properties window, go to the Web tab and make sure that “Local IIS” or “IIS Express” is selected as the development server.
• If “IIS Express” is selected, click on the “Create Virtual Directory” button to ensure that the project is configured correctly.
• Save and close the project properties window.
• Clean and rebuild the project to ensure that any configuration changes are applied.

By following these steps, you should be able to create a webform in ASP.NET without getting IIS Express errors.