You can create custom global properties for a Web Forms project after you select the “Custom defined configuration settings” radio button on the Configuration tab page of the Project painter. This selection enables the Add button. Clicking Add causes the Add User Defined Configuration Setting dialog box to display. You use this dialog box to add a custom global property and a value for that property.
You cannot use a system global property name as the name for a custom global property. When you select a custom global property in the Key and Value list box on the Configuration tab page of the Project painter, the Edit and Delete buttons become enabled. You click the Edit button to change the value of a custom global property. You click Delete to remove a custom global property and its value.
