overload and override which happens when : compile or runtime

Overload and Override: which one happens at开发者_StackOverflow社区 compile time and which one at runtime?

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It depends on which language you're using, and how you're using it.

For example, in Java the overload resolution is always performed at compile-time, with override resolution is performed at execution time.

In C# that's still normally true - but if you're using C# 4's dynamic typing feature, overload resolution is performed at execution time too:

static void Foo(int y) {}
static void Foo(string y) {}

...
dynamic x = 10;
Foo(x); // Calls Foo(int)
x = "hello";
Foo(x); // Calls Foo(string)

There are plenty of other languages which behave dynamically too. So you really need to learn the behaviour of the language you're using at the time.

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Overload -> Compile time Override -> Runtime