what is the different between IDictionary.GetEnumerator and IEnumerable.GetEnumerator

[Lyu KingT]

i am glad to read this post:
Why two GetEnumerator methods implementing IDictionary?

and what i learned from the post is the different between Implicit and Explicit Interface Implementations.
however, i do still not understand the difference between
IDictionary.GetEnumerator() : System.Collections.IDictionaryEnumerator
and
IEnumerable.GetEnumerator() : System.Collections.IEnumerator

and i wish to know when implementing IDictionary, which one of GetEnumerator() i should explicit implementing, IDictionary.GetEnumerator() or IEnumerable.GetEnumerator().

regards.

[Christian Binder]

Try the following

      IDictionary dict = new Dictionary<string, string>();
 
      dict.Add("Test1", "Value1");
      dict.Add("Test2", "Value2");
 
      System.Diagnostics.Debug.WriteLine("ForEach with IDictionary");
 
      foreach (object v1 in (IDictionary)dict) {
        System.Diagnostics.Debug.WriteLine(v1.GetType().Name);
      }
 
      System.Diagnostics.Debug.WriteLine("ForEach with IEnumerable");
 
      foreach (object v2 in (IEnumerable)dict) {
        System.Diagnostics.Debug.WriteLine(v2.GetType().Name);
      }
 

You'll see, that the first one, returns a DictionaryEntry
and the second one returns a KeyValuePair<string, string>