为什么此代码在循环列表时抛出 'InvalidOperationException'？

Question

我在迭代以下循环时收到 InvalidOperationException。

foreach (LetterPoint word in NonIntersectingWordsLocations) {
        if (IntersectingWordsLocations.Any(item => item.Position.X == word.Position.X && item.Position.Y == word.Position.Y && item.Letter == word.Letter)) {
            NonIntersectingWordsLocations.Remove(word);
        }
    }

在代码的那一点，IntersectingWordsLocations 总共包含 12 个元素，NonIntersectingWordLocations 总共包含 57 个元素。两个列表都包含 NO 个无效或空元素。

其中一个列表元素在列表中如下所示：{(LETTER:R, POSITION:(X:1Y:2))}

这是我用于列表的 class...

LetterPoint.cs

public class LetterPoint : LetterData<Point>, IEquatable<LetterPoint> {
    public Point Position {
        get { return Item; }
        set { Item = value; }
    }
    public LetterPoint(char c = ' ', int row = 0, int col = 0) {
        Letter = c;
        Position = new Point(row, col);
    }
    public string PositionToString => $"(X:{Item.X}Y:{Item.Y})";
    public override string ToString() => $"(LETTER:{Letter}, POSITION:{PositionToString})";

    // TO USE THE .COMPARE FUNCTION IN THE MAIN FILE
    public bool Equals(LetterPoint other) => Letter == other.Letter && Position == other.Position;
}

为什么我会收到此错误消息？

编辑： 我收到的错误消息是..

An unhandled exception of type 'System.InvalidOperationException' occurred in mscorlib.dll

Additional information: Collection was modified; enumeration operation may not execute.

Answer 1

因为你不能在对它的每个操作期间修改（删除或添加元素）到列表，请尝试使用 for 循环。

为什么此代码在循环列表时抛出 'InvalidOperationException'？

Why is this code throwing an 'InvalidOperationException' when looping a list?

c#

error-handling

invalidoperationexception