Csharp 如何正确处置所有动态控件

我能够从你的代码中重现这种行为.我认为问题来自于在更改集合的同时迭代ControlCollection.要避免此问题，请将其转换为一个数组，该数组将使您免受更改的影响.

public partial class Form1 : Form
{
    Form frm = new Form2();
    public Form1() => InitializeComponent();
    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        buttonCreateButtons.Click += onCreateButtons;
        buttonDisposeButtons.Click += onDisposeButtons;
        frm.Show(this);
        frm.Location = new Point(Right + 10, Top);
    }
    private void onCreateButtons(object? sender, EventArgs e)
    {
        for (int t = 0; t < 10; t++)
        {
            Button button = new Button
            {
                Text = $"Button {t}",
                AutoSize = true,
                Margin = new Padding(0,10,0,0),
             };
             button.Location = new Point(10, button.Margin.Top + ((button.Margin.Vertical + button.Height) * t));
             frm.Controls.Add(button);
        }
    }
    private void onDisposeButtons(object? sender, EventArgs e)
    {
        // Here is where you need an array instead of an iterator.
        foreach (var control in frm.Controls.OfType<Button>().ToArray())
        {
            control?.Dispose();
        }
    }
}