. Net – optimistic concurrent remove method of concurrent dictionary

I look for a method in the concurrentdictionary that allows me to press the key to delete an entry. If and only if the value is equal to the value I specify, it is similar to tryupdate, but for deletion

The only way to do this seems to be this method:

ICollection<KeyValuePair<K,V>>.Remove(KeyValuePair<K,V> keyValuePair)

It is an explicit implementation of the icollection interface. In other words, I must first convert the concurrentdictionary to icollection so that I can call remove

The deletion completely meets my requirements, and the projection is no big deal. The source code also shows that it calls the private methods tryremovalinternal and bool matchvalue = true, so it looks very beautiful

But what worries me is that it does not record the optimistic concurrent remove method as concurrent dictionary, so http://msdn.microsoft.com/en-us/library/dd287153.aspx Only icollection templates are copied, and how to: add and remove items from a concurrent dictionary does not mention this method

Does anyone know if this is feasible, or if there are other ways I don't know?

Solution

Although it is not an official document, this MSDN blog post may be helpful Key point of this article: as mentioned in the question, it is feasible to convert to icollection and call its remove method

The following is a fragment of the above blog post, which wraps it in the tryremove extension method:

public static bool TryRemove<TKey,TValue>(
    this ConcurrentDictionary<TKey,TValue> dictionary,TKey key,TValue value)
{
    if (dictionary == null)
      throw new ArgumentNullException("dictionary");
    return ((ICollection<KeyValuePair<TKey,TValue>>)dictionary).Remove(
        new KeyValuePair<TKey,TValue>(key,value));
}