Question

How can I get all keys in System.Collections.Specialized.HybridDictionary without using foreach?

I have a method

void Get(IDictionary options)
{
...
}

And while debugging I can set up a breakpoints inside a body of this method. I want to see all keys of options in the watch window in Visual Studio 2010.

Answer 1

There’s a property Keys, are you looking for that?

var allKeys = dict.Keys;

MSDN

Gets an ICollection containing the keys in the HybridDictionary.

The order of the values in the ICollection is unspecified, but it is
the same order as the associated values in the ICollection returned by
the Values method.

Retrieving the value of this property is an O(1) operation.

If you instead want to access it like a List(what is not necessarily a good idea as you can see from the remark section of msdn quoted above):

var allKeys = new List<object>(dict.Keys.Count);
allKeys.AddRange(dict.Keys.Cast<object>());

(which uses a loop implicitely anyway)

Edit:

Actually I need to see all keys in the watch window while debugging in
Visual Studio 2010. I can’t use foreach and List in the watch window.

Then execute this in the quick-watch-window:

string.Join("," , dict.Keys.Cast<object>());