Can someone tell me is there any difference between code in C# from .NET1 and .NET4 so can i use examples from visual studio 6 for istance into visual studio 2010?

There's a lot of deprecated functions in higher version of .Net. But still you can work with your older ones into the new version but you need to recompile and fix other errors if any is found.

If your code is too large and you'll be migrating it to new version of .Net you really need sometime to fix it up properly.

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