BizTalk Server: Handling decimal types with the xpath() Function

Last week, I spent some time looking at a problem with a customer’s orchestration. In one place, the developer had made use of the infamous BizTalk xpath() function to assign a value in one messageto a decimal field in another message. He got an error stating that the application is “Unable to cast object of type ‘System.Double’ to type ‘System.Xml.XmlNodeList'”. This is due to a logical error in BizTalk’s code. Read more at http://geekswithblogs.net/cyoung/archive/2010/02/23/biztalk-server-handling-decimal-types-with-the-xpath-function.aspx.