How to use a dictionary in a multi threading application

Question

Alright i have an application which starts hundreds of crawling tasks at the same time and those tasks adds hundreds of found urls into a dictionary

I am using lock to add each found url however i see that all threads are waiting at lock (it works but i am looking for faster working way if there is any)

I wonder are there any better way for me to improve performance

The application is .net 4.5.1 c#-5 WPF application

This is my dictionary definition

   private static Dictionary<string, UrlHolder> dicUrlHolder = new Dictionary<string, UrlHolder>();

This is how i use

lock (dicUrlHolder)
        {
//do stuff here each time gets a lock
        }

So i wonder any other better way to use it between hundreds of threads locking concurrently hundreds of times to add / update

Answer 1

You can use ConcurrentDictionary<TKey, TValue> Class

http://msdn.microsoft.com/en-us/library/dd287191(v=vs.110).aspx