Hands-On Parallel Programming with C# 8 and .NET Core 3

Using ConcurrentDictionary<TKey,TValue>

ConcurrentDictionary<TKey,TValue> represents a thread-safe dictionary. It is used to hold key-value pairs that can be read or written in a thread-safe manner.

ConcurrentDictionary can be created as follows:

ConcurrentDictionary<int, int> concurrentDictionary = new ConcurrentDictionary<int, int>();

Items can be added to the dictionary as follows:

concurrentDictionary.TryAdd(i, i * i);string value = (i * i).ToString();// Add item if not exist or else updateconcurrentDictionary.AddOrUpdate(i, value,(key, val) => (key * key).ToString()); //Fetches item with key 5 or if not exist than add key 5 with value 25concurrentDictionary.GetOrAdd(5, "25");

Items can be removed from the dictionary as follows:

string ...