Microsoft has a nifty little tool called xsd.exe which lets you create serializable classes for the .NET framework from an XSD or XML file.
PS>.\xsd juliankay.xsd /c /l:cs Microsoft (R) Xml Schemas/DataTypes support utility [Microsoft (R) .NET Framework, Version 2.0.50727.3038] Copyright (C) Microsoft Corporation. All rights reserved. Writing file 'C:\Users\Julian.Kay\Desktop\juliankay.cs'.
Unfortunately it doesn’t come with the latest versions of Visual Studio and you have to download the Windows SDK to get hold of it.
Or you can just download it here!