.NET Framework 是 Microsoft 推出的一个全面且一致的编程模型，用于构建具有以下特点的应用程序：在外观方面提供无以伦比的用户体验；支持无缝而安全的通信；能够为一系列业务流程建立模型。
.NET Micro Framework 4.2 RTM更新如下：
Remote Firmware Update: The .NET Micro Framework SDK and PK now support updating your device firmware remotely.
Complete Cryptographic Object Model over PCKS #11: Most types and algorithms used in the desktop framework are now supported. PKCS #11 allows extensibility at the firmware level for adding new cryptographic tokens.
1-Wire, PWM and A/D object model: Support for PWM and A/D operations is now provided as a standard interface. 1-Wire is provided through a community development effort
SNTP and FTP (client and server): Support for SNTP and FTP is provided as a community development effort.
StringBuilder and Regex types: Support for StringBuilder and Regex is provided as a community development effort.
VB.NET: The SDK now support VB.NET.
Support for Cortex M3 devices with STM32 processor family samples: The support for the STM32 family is provided as a community development effort and features two solutions for two different development boards. See the Porting Kit for details.
PKStudio: PKStudio supplements SolutionWizard to create solutions for the Porting Kit environment. See the Porting Kit distribution for details. (PKStudio code can be in the community branch under %SPOCLIENT%CLRToolsPlatformDesignerPKStudio and the binaries are instead in the %SPOCLIENT%ToolsinPKStudio directory ready to use)
.NET Micro Framework 4.2 RTM下载地址：