.NET Compact Framework
Version of the .NET Framework
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Through Application software and Operating system
Development
It is possible to develop applications that use the .NET Compact Framework in Visual Studio .NET 2003, in Visual Studio 2005 and in Visual Studio 2008, in C# or Visual Basic .NET. Applications developed with Basic4ppc are also eventually compiled for the .NET CF. The resulting applications are designed to run on a special, mobile-device, high performance JIT compiler.
The Microsoft .NET Compact Framework 3.5 Redistributable contains the common language runtime and class libraries built for the .NET Compact Framework. In addition to version 3.5 support, it also supports applications developed for version 1.0 and 2.0. The .NET Compact Framework 3.5 provides new features such as Windows Communication Foundation, LINQ, SoundPlayer, new runtime tool support, and many other features.
The UI development is based on Windows Forms which is also available on the desktop version of the .NET Framework. User interfaces can easily be created with Visual Studio by placing .NET Compact Framework controls like buttons, text boxes, etc. on the forms. Also features like data binding are available for the .NET CF. A major disadvantage of the UI development is that modern looking applications with support for finger-based touch screen interaction are not that easy to implement. This is mainly due to the desktop-oriented user interface concept on which Windows Forms is based, although some third party libraries with custom controls for this purpose are available.
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Deployment
To be able to run applications powered by the .NET Compact Framework, the platform must support the Microsoft .NET Compact Framework runtime. Some operating systems which do include .NET CF are Windows CE 4.1, Microsoft Pocket PC, Microsoft Pocket PC 2002, Smartphone 2003, and Symbian v3. .NET Compact Framework applications can be run on desktop computers with the full .NET Framework as long as they only access the shared parts of both frameworks, though their user interface cannot be upgraded to look like that of an application developed for desktop PCs.
A version of the .NET Compact Framework is also available for the Xbox 360 console. While it features the same runtime as the regular .NET CF, only a subset of the class library is available. This version is used by XNA Framework to run managed games on the console. There are other limitations as well, such as the number of threads being limited to 256. Unlike other versions of .NET CF, the Xbox 360 version allows setting processor affinity to threads created. The threads are scheduled among four concurrent threads running on the multiple processor cores of the system.