Overload resolution has always been an area of frequent attention for compiler team. So, once again there are some major changes done to make the compiler more intelligent. Let's have a look at the below snippet(picked from MSDN) first and try to predict the output: Output in Visual Studio 2010: ExampleMethod: p2 is object Output in Visual Studio 2012/13: ExampleMethod: p2 is string Explanation of code: In above code, there are two overloads with a difference of 3rd parameter params and bit a different ordering of parameters. Visual Studio 2010 picks the overload without params parameter whereas Visual Studio 2012 compiler is smarter and picks the overload which has more specific type. If all your overloads do precisely the same thing, then this change will not be a problem. But in other cases, it may lead to crashes or exceptions. So, going forward, be careful while offering method overloads.
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