Unable to see all methods and properties in XMLReaderSettings Class

ValidationType is not a member of XmlReaderSettings in the .Net Framework for Windows Store apps.

Available methods are marked with a green shopping bag in the XmlReaderSettings class documentation and will say something like the following in the individual method's Version Information:

.NET for Windows Store apps

Supported in: Windows 8

ValidationType's Version Information lists only the full .NET Framework and .NET Framework Client Profile, not the .Net fore Windows Store apps profile.

For more information see .NET for Windows Runtime apps