Thanks for your interest in Aspose.Slides.
I have observed the requirement of using Aspose.Slides for .NET in Visual Studio 2012 environment. I regret to share that currently the requested support is not available. However, I have created an issue with ID SLIDESNET-33967 in our issue tracking system to further investigate and resolve the issue.
In second part of your query, you have pointed towards our examples. Can you pleas share the complete information and issue details in this regard.