While reviewing Blendables and NetAdvantage products, I noticed that including them in XAML required something like this xmlns : igCA =" http://infragistics.com/Chart " So I started wondering how to map .NET namespaces to xmlns... The answer is pretty simple, open your libraries AssemblyInfo.cs (For those of you who also didn't know where to find it, have a look under Properties in your solution explorer) and add the following: [ assembly : XmlnsDefinition ( "http://StockWATCH...