public static void TryAdd_ConditionallyAdds()
{
var cwt = new ConditionalWeakTable <object, object>();
object value1 = new object();
object value2 = new object();
object found;
object key1 = new object();
Assert.True(cwt.TryAdd(key1, value1));
Assert.False(cwt.TryAdd(key1, value2));
Assert.True(cwt.TryGetValue(key1, out found));
Assert.Same(value1, found);
Assert.Equal(1, cwt.Count());
object key2 = new object();
Assert.True(cwt.TryAdd(key2, value1));
Assert.False(cwt.TryAdd(key2, value2));
Assert.True(cwt.TryGetValue(key2, out found));
Assert.Same(value1, found);
Assert.Equal(2, cwt.Count());
GC.KeepAlive(key1);
GC.KeepAlive(key2);
}
static void Main(string[] args)
{
var table = new ConditionalWeakTable <string, Foo>
{
{ "walterlv", new Foo("吕毅") },
{ "lindexi", new Foo("林德熙") },
};
var time = DateTime.Now.ToString("T");
table.Add(time, new Foo("时间"));
time = null;
Console.WriteLine($"开始个数：{table.Count()}");
GC.Collect();
Console.WriteLine($"剩余个数：{table.Count()}");
Console.ReadLine();
}
public static void Send(string message)
{
lock (_dictionary)
{
if (_dictionary.ContainsKey(message))
{
ConditionalWeakTable <object, List <Action> > conditionalWeakTable =
_dictionary[message];
int count = conditionalWeakTable.Count();
Console.Out.WriteLine("count = {0}", count);
foreach (KeyValuePair <object, List <Action> > keyValuePair in
conditionalWeakTable)
{
foreach (Action action in keyValuePair.Value)
{
action.Invoke();
}
}
}
}
}