DefaultName is an optional element.
For projects, this element specifies the name of the directory that stores the project on disk. For items, it specifies the file name of the source file.
When you create a project or item, you can modify the default name using the Name option, which is available from either the New Project Dialog Box or Add New Item Dialog Box.
If you do not want the project system to generate the default name for the project or item, then set the ProvideDefaultName element to False.