Sometimes it helps to see an example to get you going. From the seminars and webcast's I've been working on I get requests for the source code. In this spot I've put together some code samples that you can download and try out. Just a fair warning, these are links to code examples that are posted as is. I'll answer questions about them, but they are meant as examples, not as finished product code...
2009 Code Samples

• 12/9/09 - BTLOD - Win7 Background Services
  
• 11/4/09 - KC Win7 Launch Demo code
  
• 10/21/09 - BTLOD - Practical MVC with Jessy Houle
  
• 10/15/09 - HDC - Win7 Sensors
  
• 10/16/09 - HDC - LINQ to SharePoint
  
• 9/24/09 - Windows 7 for Developers Launch
  
• 5/21/09 - msdn Unleashed - IE8 + Win7 for Devs
  
• 5/20/09 - BTLOD - Silverlight 3.0
  
• 5/6/09 - BTLOD - VS Debug
  
• 4/8/09 - BTLOD - IE8 for Developers
  
• 3/31/09 - msdn Unleashed - Waukesha Code
  
• 3/26/09 - msdn Unleashed - Mpls Code
  
• 3/25/09 - BTLOD - Silverlight Demystified
  
• 3/24/09 - msdn - Madison Code
  
• 3/23/09 - msdn Unleashed - Chicago Code
  
• 3/11/09 - Chicago Best of...SharePoint & Silverlight Code
  
• 3/10/09 - msdn Unleashed - Kansas City Code
  
• 3/4/09 - msdn Unleashed - St. Louis Code
  
• 2/25/09 - BTLOD - WPF Toolkit
  
• 2/17/09 - Rockford .NET User Group - What's new in sp1
  
• 2/11/09 - BTLOD - IIS 7.0 For Developers
  
• 2/4/09 - BTLOD - Application Services
  
• 1/21/09 - BTLOD - Expression Design & Blend 101
  
• 1/14/09 - BTLOD - SQL 2008 Virtual Earth Demo
  
• 1/7/09 - BTLOD - Linq and C#
  

2008 Code Samples

• 12/3/08 - BTLOD - VSTO
  
• 11/19/08 - BTLOD - DemoFest
  
• 11/18/08 - Mpls SLUG Demo Code
  
• 11/14/08 - SharePoint for Devs Slide Deck
  
• 11/13/08 - MSDN Unleashed Demo Code (SQL 2008 & Silverlight 2.0)
  
• 11/12/08 - BTLOD - Membership
  
• 9/29/08 - HDC 2008 Linq to Amazon to Silverlight to SharePoint
  
• 9/9/08 - MDC 2008 Playing with Possible Code
  
• 8/28/08 - KC MSDN Event Code
  
• 8/21/08 - WPF Bonanza - MSDN Events Summer 2008
  
• 5/8/08 - SSRS 2008 Webcast Reports
  
• 5/5/08 - Launch Slide Decks
  
• 5/5/08 - Launch Demos - Heros.com
  
• 5/1/08 - Membership Demo Code
  
• 3/21/08 - SharePoint Ajax Web Parts Code
  
• 3/28/08 - SharePoint and Silverlight
  

2007 Code Samples

• 12/26 - Silverlight Video Puzzle
  
• 10/27 - Data Tool Technologies
  
• 10/27 - User Experience and XAML
  
• 9/4 - LINQ Overview
  
• 9/10 - LINQ to SQL
  
• 9/17 - LINQ to XML
  
• 9/24 - LINQ to Entities
  
• 10/22 - WCF Custom Channels
  
• 10/29 - WCF Performance and Deployment
  
• 12/7 - VB LINQ Overview

2006 Code Samples

• 1/27 - Office Launch demo - Word Addin
  
• 11/13 - SQL Tuning Code
  
• 10/23 - XMLHttpRequest Code
  
• 10/6 - Ajax Components
  
• 9/27 - XNA Demo Code
  
• 7/7 - SQL Essentials - SQL Client
  
• 6/15 - BI Quickstart - Data Mining
  
• 6/8 - BI Quickstart - Advanced DTS Code
  
• 5/11 - BI Quickstart - ADOMD Code
  
• 5/11 - BI Quickstart - MDX Code
  
• 4/20 - BI Quickstart - SSIS Code
  
• 1/31 - SQL MasterClass - UDTs code
  
• 1/10 - SQL MasterClass - MyCLR code
  
• 12/14 - Best of Launch - Ticket Site
  
• 12/9 - Best of Launch - Smart Client code
  

Older stuff

• ASP.NET 2.0 - Internals demo code
  
• ASP.NET 2.0 - Master Pages, Themes & Navigation
  
• ASP.NET 2.0 - Data Binding
  
• ASP.NET 2.0 - Performance
  
• WinForms Bonanza - in C#
  
• WinForms Bonanza - in VB
  
• DNN3 - Report Manager Module Code
  
• WebService Bonanza - VB Code
  
• TCP Protocol Web Service