Surprises in C#

Ok, after a long period of silence I decided to take some time to write about one detail of C# that stroke me yesterday. Given the following C# snipped, what you expect as the output ? (ok, I hand picked this example which I see as an extreme corner case)

	using static System.Console;
	class Test
	{
	static void M<T>(string s, T t)
	{
	WriteLine($"Generic : s = {s}, t = {t}");
	}
	static void M(string t, string s)
	{
	WriteLine($"Non Generic: s = {s}, t = {t}");
	}
	static void Main()
	{
	M("Hello", "World");
	M("Hello", t: "World");
	M(s:"Hello", t: "World");
	}
	}

view raw Surprise.cs hosted with ❤ by GitHub

To my surprise the middle one invokes the generic version of M (now that I've thought more about it, it makes sense).

The outcome of this little experiment is that I feel even more compelled to stay away from introducing generic/non generic versions of a method.

Happy codding