Question

I am filling a combobox with dropdown values of type WagonType. The function I am calling returns a dictionary where the key is the WagonTypeID and the value is the WagonType.

RepositoryItemComboBox comboWagonTypes;
Dictionary<int, WagonType> GetAllWagonTypes()
{
  ...
}

If I use AddRange to fill the collection will it insert only the values or both the keys and the values?

comboWagonTypes.Items.AddRange(GetAllWagonTypes());

Or do I need to iterate through the dictionary and insert the values myself?

foreach (var wagonType in GetAllWagonTypes())
   comboWagonTypes.Items.Add(wagonType.Value)

Answer 1

You need to use the Values property of the dictionary.

Just do

comboWagonTypes.Items.AddRange(GetAllWagonTypes().Values);