Debug.WriteLine() 是线程安全的吗?
根据 这里 的说明,它是线程安全的。但是,在我的多线程程序中,我得到了一些奇怪的输出。
例如:
代码
// these statements are found throughout the program
Debug.WriteLine("Polled database. {0} batch items retrieved.", items.Count());
Debug.WriteLine("Queued batch item: {0}", bm.BatchName);
Debug.WriteLine("Discarded batch item: {0} already queued.", bm.BatchName);
Debug.WriteLine("Creating task for batch item: {0}", bm.BatchName);
Debug.WriteLine("Removed batch item from processing items collection: {0}", bm.BatchName);
Debug.WriteLine("Could not remove batch item from processing items collection: {0}", bm.BatchName);
Debug.WriteLine("Begin Processing: {0}", bm.BatchName);
Debug.WriteLine("End Processing: {0}", bm.BatchName);
输出
"Polled database. 0 batch items retrieved."
"Polled database. 0 batch items retrieved."
"Polled database. 0 batch items retrieved."
"Polled database. 0 batch items retrieved."
"Polled database. 1 batch items retrieved."
"ronnie's batch: Queued batch item: {0}"
"ronnie's batch: Creating task for batch item: {0}"
"Begin Processing: ronnie's batch"
"Polled database. 1 batch items retrieved."
"ronnie's batch: Discarded batch item: {0} already queued."
"End Processing: ronnie's batch"
"ronnie's batch: Removed batch item from processing items collection: {0}"
"Polled database. 0 batch items retrieved."
你可以看到,当使用 ronnie's batch: Queued batch item: {0}
时,出现了问题。如果我先使用 string.Format(),就不会有这个问题。是什么原因导致的呢?
{0}
。 - dlev