Newbie ask for help!

I read a pdf document - netduino Getting Started, in “install”, it recommended to download and install 3 software:
1.Microsoft Visual C# Express 2010
2.Microsoft .NET Micro Framework v4.1 SDK
3.Netduino SDK v4.1
while, from the latter description, I found “2.Microsoft .NET Micro Framework v4.1 SDK” hasn’t been used, is it necessary or not ? If it was necessary, what’s the function of it for Netduino ?

Firstly, welcome…

The latest installation instructions can be found in the documentation section of this web site.

All of the components listed are necessary to work with the Netduino boards.

Hope this helps,