How to set dictionary values to null

Question

I'm wondering if there is a way to put all dictionary values to null (or each elements) ? Because we can't iterate on it if the values has been changed to null.

(I've searched on Stackoverflow before asking this simple question but I didn't find a clear response on this issue).

Regards

Answer 1

Is this what you want?

foreach(var key in dict.Keys.ToList())
    dict[key] = null;

Important: The call to ToList(). This will copy the keys to a temporary list. Otherwise you would get an InvalidOperationException with the message:

Collection was modified; enumeration operation may not execute.