[Cr3aTor]

what is the best website to learn about .NET Framework ?

There isn't much of a reason to learn from any website. The best way to learn is to do something that requires it. I'd advise you first learn C (NOT C++!), and then just pick a project that you'd like to do in C# and figure it out the hard way.

^^^
You shouldn't read all day about something without practicing it. Think of a project, as said above, and only if you don't know how to achieve some needed functionality use search engines to answer your doubts. Get it implemented. Repeat