C# - different .NET framework versions -


did encounter portability issues when performing .net runtime upgrade (e.g switching 2.0 -> 3 -> 3.5 -> 4 -> 4.5)?

i couldn't find proof fact upgrading higher version of runtime wouldn't affect behavior of application (i guess should so, but, well, there hidden caveats).

there few changes change behavior of existing code, these in cases rare edge cases , kept minimum. can find list of breaking changes recent releases of visual studio:

visual c# 2012 rc breaking changes
visual c# 2010 breaking changes
visual c# 2008 breaking changes


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