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This book assumes that you are already familiar with the basics of the .NET Framework and the C# programming language. If you aren’t already experienced in either of these, this book will still be useful, but I first suggest familiarizing yourself with the basics before diving in.
That said, this book does not assume any level of familiarity with mobile development prior to reading. If you’re brand new to mobile development, or even if you’re familiar with the platforms but are curious to see how to leverage C# across them, this book will walk you through everything you need in order to get started writing your applications.