[via Dan Fernandez’s Blog]

Lots of good stuff you can download from here.

Base Class Libraries

• Changing ACL (Access Control Lists) on files
• Console Enhancements including buffer control, simple animations and colors
• Downloading files using FTP (File Transfer Protocol)
• Network Programming including PING, UDP, and TCP network statistics
• Using the new Stopwatch class to measure time
• Compressing and decompressing files in the GZip format
• Retrieving Drive Information
• Using Generic Collections
• Creating Regular Expressions to parse text 
• Building a tracing infrastructure to track errors and application performance
• Controlling cache policies with the new System.Net.Cache namespace
• Creating a process viewer
• Creating a Windows service manager
• Using the data protection API
• Encrypting and decrypting data
• Using platform invoke to access legacy or unmanaged code from within managed code  
• Building in support for localization
• Using the NGEN utility
• Using the new SecureString class
• Using new socket class methods
• Using serial ports with the new Port class
• Working with the file system
• Working with threads to manage multiple tasks simultaneously
• Building a simple web server with HTTPListener 

Data Access Samples

• Asynchronous Queries
• Attaching a database with your application
• Creating and using User Defined Types with SQL Server 2005
• DataReader vs. DataSet comparision
• DataSet and DataTable Enhancements
• Performing Batch Updates and Data Paging
• Performing Bulk Updates
• Reading and Writing Images from a Database  
• Using Factory Classes
• Using Managed Stored Procedures and User Defined Functions with SQL Server 2005
• Using Multiple Active Result Sets with SQL Server 2005
• Using Notifications with SQL Server 2005
• Using the XML data type with SQL Server 2005
• XPath and XSLT Transformations Enhancements

Web Development Samples

• Using SQLCacheDependency for caching
• DataBinding using the ObjectDataSource, SqlDataSource, and XmlDataSource objects
• Create a Master/Details view using the DataGridView and DetailsView controls
• Basic Master Pages, Nested Master Pages, and Browser-specific Master Pages
• Using the new membership controls including the LoginStatus, LoginName,
• LoginView, CreateUserWizard controls 
• Using the Menu and SiteMapPath controls
• Using Profiles to store user properties
• Using the Membership and Roles API for custom roles
• Using the TreeView control dynamically and responding to TreeView events
• Creating a custom portal 

Visual Studio Tools for Office

• Creating custom menus in Outlook
• Creating smart tags in documents
• Creating custom toolbars
• Data islands and caching
• Integrating Windows forms into Outlook
• Using bookmarks in Word
• Using managed controls in Excel
• Using VBA and VSTO together 
• Working with charts in Excel
• Working with contacts and tasks in Outlook
• Working with InfoPath 2003
• Working with named ranges in Excel
• Working with the In Box
• Working with XML in Excel
• Working with XML in Word
• Using the List object 

Tablet PC

• Utilizing the back of pen erase feature
• Creating a content enabled form
• Working with drawing attributes
• Enabling gestures 
• An ink-enabled text box
• Creating power aware applications
• Simple text recognition
• Speech recognition 

Compact Framework Samples

• Creating a setup CAB
• Creating a data-centric application
• Creating a data-centric application (part 2)
• Using the date/time picker feature in the month calendar
• Document list
• Embedded resources
• Handling the screen orientation
• Handling the hardware button screen orientation
• Help and notifications
• Registry sample
• Creating a SQL CE result set
• Using Microsoft Message Queue (MSMQ)
• Web browser sample