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The compiler will report an error on the call to the Swap() function. Why?

April 26, 2017compiler Error function report swap

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The compiler will report an error on the call to the Swap() function. Why?

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public static void Swap(ref object a, ref object b) { a = 5; b = “Hello”; } If the compiler allowed this code, it would mean assigning a boxed int to a Dog object, which is clearly not type safe.