How to pick the different auto generated class(reportdefinition.xsd) using xsd.exe with same class name at runtime using c#

I have a need to autogenerate the SSRS Report definition xsd based on ssrs 2005,2008 and 2010 using xsd.exe.ALl the 3 xsd have the same class names when autogenerated however the namespaces are different.

I need to find the best way to implement this, so that I can reuse my code and just load the appropriate autogenerated class at runtime.

Same class name in the same project gives an ambiguous reference.