Some confusion between ASP.NET 4.0 and 2.0
<p>I am trying to make a website in C# ASP.NET.  I have been given some code as well as visual studio 2010.  The code I was given was written in ASP.NET 4.0, so I obviously want to code in that, but my web hosting only supports ASP.NET 2.0.  If I upgrade to 4.0 what's the difference as far as compatibility issues with all browsers, or any draw backs to using 4.0.  I am using 1&amp;1 hosting so it is a pretty commercial hosting, maybe there is a reason why they do not have 4.0 standard on their servers?  Thanks guys!</p>
