Unity 2 - Why has the BuildUp method changed?

I am starting to use Unity 2 , having happily used earlier versions. I notice that the IUnityContainer.BuildUP(object obj) method has been removed. Why has this happened?

It's here, that's for shure. It's just moved to extension methods. http://msdn.microsoft.com/en-us/library/microsoft.practices.unity.unitycontainerextensions_members(v=PandP.20).aspx

Perhaps you don't have

using Microsoft.Practices.Unity

In some cases you'll have to add it when migrating from unity 1.2

The following overload is replacement for IUnityContainer.BuildUp(object obj)(actualy BuildUp(T obj)) becouse params ResolverOverride[] resolverOverrides are optional http://msdn.microsoft.com/en-us/library/ff662062(v=PandP.20).aspx, so your code should compile without any changes