You work as an Enterprise Application Developer for ABC Inc. The company uses Visual Studio .NET 2008 as its application development platform. You are creating an Enterprise application using .NET Framework 3.5. The application must meet the following requirements:

l The application loads XML from streams.

l The application creates XML from scratch by using functional construction.

l The application queries XML using XPath-like axes.

l The application validates XML trees using XSD.

What will you do to meet these requirements with least development efforts?