The Netduino 2 is a 32bit microcontroller board running the .Net Micro Framework so you can do embedded development with C# and Visual Studio. Enjoy proper debugging and managed code while developing electronics based projects.
Netduino looks like an Arduino Uno but on the inside it is a 32bit Cortex-M3 microcontroller from STmicro. It runs the .Net Micro framework allowing you to be super productive writing C# in Visual Studio. Because the Netduino has the same form factor and pin assignments as the Uno it works with Arduino R3 shields.
But there's more. Running at 120MHz the Netduino 2 has 192KB of code space and 60KB of RAM, UART, PWM, I2C, 12-bit ADC and DAC. You even get a micro-B USB cable and some sticky feet to keep it on your desk.