Initializing a string array in a method call as a parameter in C#

Question

If I have a method like this:

public void DoSomething(int Count, string[] Lines)
{
   //Do stuff here...
}

Why can\'t I call it like this?<

Answer 1

Try this:

DoSomething(10, new string[] {"One", "Two", "Three"});

Answer 2

You can construct it while passing it in like so:

DoSomething(10, new string[] { "One", "Two", "Three"});

Answer 3

you can do this :

DoSomething(10, new[] {"One", "Two", "Three"});

provided all the objects are of the same type you don't need to specify the type in the array definition

Answer 4

If DoSomething is a function that you can modify, you can use the params keyword to pass in multiple arguments without creating an array. It will also accept arrays correctly, so there's no need to "deconstruct" an existing array.

class x
{
    public static void foo(params string[] ss)
    {
        foreach (string s in ss)
        {
            System.Console.WriteLine(s);
        }
    }

    public static void Main()
    {
        foo("a", "b", "c");
        string[] s = new string[] { "d", "e", "f" };
        foo(s);
    }
}

Output:

$ ./d.exe 
a
b
c
d
e
f