Why doesn't the C# compiler get confused about methods that have default arguments?
In the below code SayHello() may refer to:
- SayHello()
- SayHello(string arg1 = null)
- SayHello(string arg1 = null, string arg2 = null)
- SayHello(string arg1 = null, string arg2 = null, string arg3 = null)
But this code compiles successfully without any ambiguous errors.
class Program
{
private static void SayHello()
{
Console.WriteLine("Hello 1");
return;
}
private static void SayHello(string arg1 = null)
{
Console.WriteLine("Hello 2");
return;
}
private static void SayHello(string arg1 = null, string arg2 = null)
{
Console.WriteLine("Hello 3");
return;
}
private static void SayHello(string arg1 = null, string arg2 = null, string arg3 = null)
{
Console.WriteLine("Hello 3");
return;
}
private static void Main(string[] args)
{
SayHello(); // SayHello() invoked, but SayHello(string arg1 = null) not invoked.
SayHello("arg1");
SayHello("arg1", "arg2", "arg3");
// Output is:
// Hello 1
// Hello 2
// Hello 3
return;
}
}