[英]Why this lock statement doesn't work?
why this lock test doesn't work ? 为什么这个锁定测试不起作用? it's throwing an exception bellow Console.Write that collection was modified....
它正在抛出一个异常的控制台.Write该集合被修改了....
static List<string> staticVar = new List<string>();
static void Main(string[] args)
{
Action<IEnumerable<int>> assyncMethod = enumerator =>
{
lock (staticVar)
foreach (int item in enumerator)
staticVar.Add(item.ToString());
};
assyncMethod.BeginInvoke(Enumerable.Range(0, 500000), null, null);
Thread.Sleep(100);
Console.Write(staticVar.Count());
foreach (string item in staticVar)
{
}
}
In order for a lock to be effective it must be used in all cases that a collection is accessed. 为了使锁有效,必须在访问集合的所有情况下使用它。 Be it reading or writing.
无论是阅读还是写作。 So you must add a lock before enumerating the collection
因此,您必须在枚举集合之前添加锁
For example 例如
lock (staticVar) {
Console.Write(staticVar.Count());
foreach (string item in staticVar) {
}
}
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