In this post I’ll be showing you how to use Visual Studio 2010 performance analysis tools to find slow parts in your code, make changes and then verify that those fixes have actually been beneficial. I will be analyzing the LIFTI code as of change set 54973, so if you want to you can download it and follow along, …

Read More

In my last blog post I described how I implemented the lock manager in LIFTI. This was pretty straightforward because ReaderWriterLockSlim was leveraged to do all of the really heavy lifting, but the hard part came when I wanted to unit test the code. This post will take you through the thought and implementation …

Read More

I’ve wanted to get a bit of thread-safety going in LIFTI for a little while now because one of the my target scenarios was for the index to be hosted in a website. The index is already thread safe for concurrent reads, but it would definitely be a really bad thing if we started mixing concurrent writes with our reads, …

Read More

Happy new year! If anyone has been following the recent check-ins that have been happening over on the LIFTI CodePlex site will have noticed quite a bit of activity over the Christmas period. In this article, I’ll try to summarise what those changes have been and why they were introduced in the way that they were. In …

Read More

As always, you can find the LIFTI project at its CodePlex home: http://lifti.codeplex.com. Until now, the way in which you can query against LIFTI has been pretty basic. If you searched for “apple orange”, you would only get items back that had words starting with both apple and orange in their associated text. For …

Read More

Working with other people is hard. Working with new SDK documentation is even harder, especially when it’s wrong. If you’re following the Working with OAuth WRAP Windows Live SDK documentation and you get to the Acquiring an Access Token sample you’ll probably encounter a 401 unauthorized error when you try and read …

Read More

Back in the original post where I first introduced LIFTI I wrote: LIFTI will not…: Handle word derivatives, e.g. if “Cats” is searched for, objects containing just the word “Cat” would not be returned. This was always something that I wanted to handle, but felt that it was better to have a simple system that actually …

Read More

UPDATE 9 April 2014: The source is also available on GitHub T4 (the Text Template Transformation Toolkit) is slowly becoming more widely known as a way to generate code to be compiled and used alongside hand-written code. Frameworks such as the Entity Framework V4 have adopted it for its code generation, allowing you …

Read More

This post will show how LIFTI can be adapted to index and search upon Pascal-cased words, similar to Visual Studio 2010’s Navigate To window. (Or Resharper’s Go to symbol command, if you’re so inclined) The code for this sample can be found in the Lifti solution:* …

Read More

If you’ve created your own authentication service for a Silverlight RIA application, you might encounter the following scenarios:

1. If you get the following errors: GetUser should have returned a single user Logout should have returned a single, anonymous user Then the chances are your implementation of GetDefaultUser …

Read More