Many times when working with different APIs we find some functionality that is useful but often times tedious to get at. A couple examples that come to mind are accessing OSI PI data (it comes back in a series of jagged arrays forcing you to have to check for null, etc) and Microsoft StreamInsight diagnostic views. Since we don’t have access to the original code to make the changes directly to the API, one of the best ways to extend it is to use extension methods. Sometimes we forget that we have this tool in the toolbox. I came across a good blog post from the DevBiker called A couple of helpful StreamInsight Query extension methods. There are a couple of extension methods in there that smooth out some of the rough edges when dealing with StreamInsight’s Query object.