为什么我会收到 InvalidOperationException？
foreach (var shotItem in Invadershots)// it points to me to there and doesnt allow me to loop.."{"Collection was modified; enumeration operation may not execute."}"
{
shotItem.Move();// it happens when this simple method called (which actually checks some bool..if the shot was out of the winform).
if (shotItem.removeShot)
{
Invadershots.Remove(shotItem);
}
}
难道是因为我同时更改了列表项？
我怎样才能防止该错误发生？
foreach (var shotItem in Invadershots)// it points to me to there and doesnt allow me to loop.."{"Collection was modified; enumeration operation may not execute."}"
{
shotItem.Move();// it happens when this simple method called (which actually checks some bool..if the shot was out of the winform).
if (shotItem.removeShot)
{
Invadershots.Remove(shotItem);
}
}
Could it be because i change the List items simultaneously?
How can i prevent that error from occurring?
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这是因为您尝试修改集合
Invadershots这在 foreach 中是不允许的，请使用 for 代替。
This is because you trying modify collection
InvadershotsThis is not allowed within foreach, use for instead..
您无法在枚举集合时更改集合。创建该集合的克隆并对其进行更改。
You cannot alter a collection whilst enumerating across it. Create a clone of the collection and alter that.
您不能将元素删除到列表中，您在 foreach 中读取的元素肯定会崩溃，尝试在 foreach 中创建一个副本以将其删除，或者创建一个 for 迭代和控制正确的元素数量和输出条件。
再见
You can't do that deleting an element into a List, that you'r reading in a foreach will crash, surely, try to make a copy to remove with that while you're in the foreach, or make a for iteration and control de number of elements correctly and the out condition.
See you