ASPxFileManager - How to implement a LINQ to SQL based file system provider

This example shows how to create a LINQ to SQL based file system provider for the ASPxFileManager. The provider retrieves data from DataContext connected to a database containing file/folder structure and contents. To improve performance, we do the following:

- Cache a folder list in memory to decrease the number of recursive LINQ to SQL queries made to a database (see the FolderCache property and the RefreshFolderCache method).

- Use delayed loading for the Data property mapped to a database field that stores file contents (the Delay Loaded property is set to True for this property in the DbFileSystemItem entity class).