Hashtable to Dictionary

Anonymous User 2914 17 Dec 2013

I am trying to convert a hashtable to disctionary and found a a question here: convert HashTable to Dictionary in C#

public static Dictionary<K,V> HashtableToDictionary<K,V> (Hashtable table)
{
    return table
        .Cast<DictionaryEntry> ()
        .ToDictionary (kvp => (K)kvp.Key, kvp => (V)kvp.Value);
}

When I try to use it, there is an error in table.Cast; intellisense does not show "Cast" as a valid method.

Ask by Anonymous User

Updated 17 Dec 2013

1 Answers

Pravesh Singh 17 Dec 2013

Hi Ankita,

Enumerable.Cast doesn't exist in .NET 2, nor does most of the LINQ related methods (such as ToDictionary).

You'll need to do this manually via looping:

public static Dictionary<K,V> HashtableToDictionary<K,V> (Hashtable table)
{
    Dictionary<K,V> dict = new Dictionary<K,V>();
    foreach(DictionaryEntry kvp in table)
        dict.Add((K)kvp.Key, (V)kvp.Value);
    return dict;
}

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