C# Get Keys from a Dictionary<string, Stream>

Question

Suppose I have a Dictionary like so:

Dictionary<string, Stream>

How can I get a list (or IEnumerable or whatever) of JUST the Keys from this dictionary? Is this possible?

I could enumerate the dictionary, and extract the keys one by one, but I was hoping to avoid this.

In my instance, the Dictionary contains a list of filenames (file1.doc, filex.bmp etc...) and the stream content of the file from another part of the application.

Answer 1

KeyCollection Dictionary(TKey, TValue).Keys

Answer 2

Dictionary(TKey, TValue).Keys

Typically you can discover these things through code-completion/IntelliSense.

Similarly, there is a Values property:

Answer 3

Dictionary<T,T>.Keys returns a KeyCollection. This has the IEnumerable interface.

so...

foreach(string key in Dictionary<string,Stream>.Keys)
{


}

Answer 4

public IEnumerable<long> ReturnSomeKeys()
{
    var foo = new Dictionary<long, string>();
    return foo.Keys;
}

This does what you want.