Microsoft’s .NET Micro Framework (NETMF) is a re-implementation of desktop .NET CLR for embedded devices with limited resources. But at the same time, the developer can enjoy the easy and rich development platform the NETMF offers, on devices with greater resources.
You can create applications that run on a range of systems from tiny devices, like remote controls, to PCs and Servers on the cloud– all with the same programming model and tools.
The .NET Micro Framework enables you to write embedded applications for small, connected, embedded devices with Visual Studio and C#. That means you can now use the same development tools and language that you use to build desktop and smart device (PDA and smartphone) applications to develop applications for microcontrollers.
What are the available .NET Micro Framework devices and development boards that you can write applications in C#?
1) Meridian CPU
You can write applications in C# using Visual Studio. The block diagram of this board is shown below:

Figure 1. Meridian CPU Block Diagram

The Meridian CPU and the .NET Micro Framework are ideal for applications such as; industrial automation, home automation, healthcare, consumer devices, retail point-of-sale, PC peripherals, and automotive applications.
2) Tahoe-II
The Tahoe-II development platform is the ideal place to start when developing small, smart, connected devices. The familiar development environment of Visual Studio enables .NET desktop programmers to work easily with this board.
The Tahoe- features a 3.5” touch-screen LCD, wired and wireless networking, USB function for interfacing to PCs, an accelerometer for innovative sensing and user interface applications. When you need to prototype a new device, the Tahoe-II has easy access to an array of expansion options; including serial ports, I2C, SPI and plenty of GPIO.
The block diagram of this Tahoe-II is shown below:

Figure 2. Tahoe-II Block Diagram