ConcurrentDictionary操作

 public class Test
    {
        private static ConcurrentDictionary<string, int> testDictionary = new ConcurrentDictionary<string, int>();

        public void test()
        {
            string _key = "a";
            int _value = 0;
            int curValue = 1;

            testDictionary.TryAdd(_key, _value);
            testDictionary.AddOrUpdate(_key, _value, (key, value) => { return value = curValue; });
            testDictionary.TryGetValue(_key, out int getValue);
            testDictionary.GetOrAdd("b", 2);
        }
    }