Best C# idiom to convert the items on an object array to a string?

Question

I have something akin to

object[] values = getValues();
string renderedValues = string.Join("-", 
                          Array.ConvertAll<object,string>(values,
                          new Converter<object,string>(o2s)
                        ));

where o2s is

public static string o2s(object o) { return o.ToString(); }

Comments welcome!

Answer 1

There exists a method for that conversion already:

string renderedValues = string.Join(
  "-",
  Array.ConvertAll<object, string>(values, Convert.ToString)
);

---

Update:

In framework 4 an overload that takes an object array was added, so it will do the conversion for you:

string renderedValues = string.Join("-", values);

Answer 2

No need to create a new Converter. Also, I'd rename the variable:

object[] values = getValues();
string joinedValues = string.Join("-", Array.ConvertAll<object,string>(values, o2s));

Answer 3

Why not Zoidberg simply this?

string renderedValues = string.Join("-", getValues());

Simply using the Join(string separator, params Object[] values) overload: http://msdn.microsoft.com/en-us/library/dd988350.aspx