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C# evolucionó a partir del lenguaje C/C++ incorporando numerosas instrucciones, funciones y palabras clave directamente relacionadas con la interfaz gráfica de Windows. Actualmente ofrece capacidades para realizar un diseño completamente orientado a objetos y directo a Microsoft .NET Framework, entorno que proporciona un amplio conjunto de interfaces de programación de aplicaciones para Windows e Internet. Desde la aparición de Visual Studio .NET, entorno de desarrollo que incluye a Visual C#, dicho paquete ha sido revisado y ampliamente modificado, con el único objetivo de ofrecer una herramienta flexible para los desarrolladores de aplicaciones de línea de negocios que crean aplicaciones Windows, Web o móviles. Así, hemos oído hablar de Visual Studio 2002, 2003 y de Visual Studio 2005 y .NET Framework 2.0. Así mismo, Visual Studio 2005 ofrece a los desarrolladores Web un ambiente altamente productivo para la rápida creación e implementación de sitios y servicios Web que pueden, opcionalmente, estar basados en AJAX. Al mismo tiempo, Microsoft ha publicado una gama de productos denominada 2005 Express, que estará enfocada a programadores no profesionales. Estos entornos de desarrollo serán versiones recortadas de Visual Basic, Visual C#, Visual C++, Visual J# y SQL Server enfocadas a principiantes, además de un nuevo producto llamado Visual Web Developer para el desarrollo de aplicaciones Web. Los desarrolladores profesionales podrán elegir también entre las versiones estándar o profesional de Visual Studio 2005, o bien herramientas más amplias como las versiones de Visual Studio 2005 Team para arquitectos, desarrolladores o probadores, que además de incluir Visual Studio 2005 profesional, incluyen también herramientas de software de ciclo de vida. Tanto Visual Studio 2005 como Visual Web Developer 2005 Express pueden ser complementados con ASP.NET AJAX para el desarrollo de aplicaciones Web basadas en AJAX. Enciclopedia de Microsoft Visual C# es un libro totalmente actualizado con las nuevas características de Microsoft Visual C# 2005, para aprender a programar escribiendo línea a línea el código de una determinada aplicación, o bien utilizando h