Best way to change dictionary key

Question

I am wondering is there a better way to change a dictionary key, for example:

var dic = new Dictionary();
dic.Add(\"a\", 1);

Answer 1

No, you cannot rename keys once that have been added to a Dictionary. If you want a rename facility, perhaps add your own extension method:

public static void RenameKey(this IDictionary dic,
                                      TKey fromKey, TKey toKey)
{
  TValue value = dic[fromKey];
  dic.Remove(fromKey);
  dic[toKey] = value;
}