Compile time polymorphism vs. run time polymorphism

Question

Why is overloading called compile time polymorphism and Overriding run time polymorphism in C#?

Answer 1

Classical examples of static polimorphism are based on template metaprogramming or Duck Typing but not on method overloading.

Static polimorphism means that desicion is made by compilier (statically), and dynamic polimorphism means that desition is made only in runtime (dynamically).