Convert dictionary to list collection in C#

To convert the Keys to a List of their own:

listNumber = dicNumber.Select(kvp => kvp.Key).ToList();

Or you can shorten it up and not even bother using select:

listNumber = dicNumber.Keys.ToList();

Alternatively:

var keys = new List<string>(dicNumber.Keys);

If you want to use Linq then you can use the following snippet:

var listNumber = dicNumber.Keys.ToList();

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