How to Safely and Efficiently Remove Elements from a Generic List While Iterating?

The best practice of removing elements from the generic list safely and efficiently

When the iterative generic list and execute the operation that may need to remove the element, it is important to choose the appropriate iteration mode to avoid common traps. For example, the use of

in the cycle will cause abnormalities, because the collection is modified during the enumeration process.

foreach Steady solution .Remove(element)

In order to solve this problem, it is recommended to use the cyclic reverse iteration list. This method ensures that the current position in the set when removing elements is accurate.

Example: for

<code class="language-csharp">for (int i = safePendingList.Count - 1; i >= 0; i--)
{
    // 处理元素
    // safependingList.RemoveAt(i);
}</code>

Alternative method

Another choice is to use

<code class="language-csharp">var list = new List<int>(Enumerable.Range(1, 10));
for (int i = list.Count - 1; i >= 0; i--)
{
    if (list[i] > 5)
        list.RemoveAt(i);
}
list.ForEach(i => Console.WriteLine(i));</code>

methods and predicate to screen the elements to be removed. This method simplifies the process and reduces the needs of manually removing elements in the cycle.

Simplified demonstration:

RemoveAll

These technologies provide a safe and reliable mechanism to safely remove elements when iterative generic lists to ensure that the code executes efficient and no abnormalities.

<code class="language-csharp">safePendingList.RemoveAll(item => item.Value == someValue);</code>

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