Question

In .net framework I constantly see overloaded functions like the following,

1. public void Log(string message)…
2. public void Log(string message, params object[] args)…

my question is since the params keyword allows zero or more parameters, could we just get rid of the first signature? With just the second signature, I could call it with no parameters fine like below, so I don’t know why they would have the first signature?

Log("calling with no param");

Answer 1

Another reason is params is slow, thinking that all parameters are collected and an array is built. So the second one is slower.

public static string Format(string format, object arg0);
public static string Format(string format, params object[] args);