圆形图像视图在UITableViewCell - Xamarin.iOS中初始加载为正方形

public class CustomTableViewCell : UITableViewCell
{
    public UIImageView CircleImageView { get; set; }

    public CustomTableViewCell(string reuseIdentifier) : base(reuseIdentifier)
    {
        CircleImageView = new UIImageView();
        // 设置imageView的frame和圆形样式
        CircleImageView.Frame = new CGRect(10, 10, 60, 60);
        CircleImageView.Layer.CornerRadius = CircleImageView.Frame.Size.Width / 2;
        CircleImageView.Layer.MasksToBounds = true;
        // 添加imageView到cell的contentView上
        ContentView.AddSubview(CircleImageView);
    }
}

public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
    var cell = tableView.DequeueReusableCell("CustomCell") as CustomTableViewCell;

    // 设置cell的其他属性
    cell.TextLabel.Text = "Some text";
    
    // 加载图像到imageView
    cell.CircleImageView.Image = UIImage.FromFile("circle_image.png");

    return cell;
}