For example, there's a dictionary like this,
using System.Collections.Generic;
Dictionary<string, int> dict = new Dictionary<string, int>();
Now we want to retrieve all keys,
var keys = dict.Keys;
That is. However, the keys is another collection type an we want to convert it to array.
There was an old way -- CopyTo.
string[] keyArray = new string[dict.Count];
dict.Keys.CopyTo(keyArray, 0);
If you have looking for better solution, and you're using C# 3.0 (and above).
Congratulation! According the MSDN library, there's a directly way -- ToArray
