c# - Why can't my Dictionary class see the ToArray() method?

Question

Hi,

I see in the API Dictionary has a ToArray() method (in the extension classes area), but when I try to use this from my Dictionary instance it can't see it???

How do I "enable" ToArray() for my Dictionary instance?

Thanks

Answer 1

The Dicitonary<TKey,TValue> class does not actually have a .ToArray method. There is an extension method called .ToArray which can bind to Dictionary<TKey,TValue>. But this requires that System.Linq be one of your usings.

Have you verified that System.Linq is imported?

Example:

using System.Linq;
...
public void Example() {
  var map = new Dictionary<string,string();
  ..
  var arr = map.ToArray();
}

Answer 2

You're probably targeting .NET 2.0, which doesn't support Extension methods. Try changing your application to target .Net 3.5