Question

I have a hash table which stores IPs as strings for the key and an object of my creation in the corresponding value.

I keep getting an exception at foreach (DictionaryEntry info in MasterHash.Keys).
More specifically it happens as the debugger gets to DictionaryEntry.
I have tried to provoke a message from my try catch statement but the compiler does not like me trying to cast e to .ToString or .Message.

private void UpdateMap(Hashtable masterHash)
{
    try
    {
        foreach (DictionaryEntry info in masterHash.Keys)
        {
            AxShockwaveFlashObjects.AxShockwaveFlash axFlash = wfh.Child as AxShockwaveFlashObjects.AxShockwaveFlash;
            IPInstance foo = (IPInstance)info.Value;

            axFlash.CallFunction(foo.GetMarkerCall().ToString(SaveOptions.DisableFormatting));
        }
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
    }
}

Answer 1

It might be an invalid cast exception. masterHash.Keys is not a DictionaryEntry. The keys should be strings (your IP string).

EDIT:

ICollection MyKeys = MyTable.Keys;

foreach (object Key in MyKeys)
{
    Console.WriteLine(Key.ToString());
}