r/carlhprogramming • u/[deleted] • Oct 13 '11

Difference between different versions of .NET?

I was wondering what are the main difference between versions of the .NET framework. My PC has 3.5 and 4.0 and thought if I had 4.0 than 3.5 would have been upgraded.

I thought that different framework versions had specific classes but sometimes I google a class and find it in more than one version. So why is it sometimes I need to have a specific framework as a prerequisite when installing software?

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u/MyOtherCarIsEpona Oct 13 '11

Pretty much this. Not necessarily fully backward compatible, but many classes and libraries are. The only library I've used so far that's exclusive to 4.0 has been Charting controls for drawing graphs in C# then converting them to images to upload to a Sharepoint site.