图像不显示在图片框 c#

Image doesn't show in picturebox c#

我想将图片从一个图片框复制到另一个图片框。代码如下:

PictureBox pictureBoxRain1 = new PictureBox();
pictureBoxRain1.Size = size;
//pictureBoxRain1.Image = (Image)Properties.Resources.kaplja;
pictureBoxRain1.Image = Image.FromFile(@"C:\images\kaplja.png");
//pictureBoxRain1.ImageLocation = pictureBoxRain.I;
//pictureBoxRain1.Image = Graphics.FromImage();
//pictureBoxRain1.InitialImage = Properties.Resources.kaplja;
//pictureBoxRain1.BackgroundImage = Properties.Resources.kaplja;
pictureBoxRain1.Location = new Point(pictureBoxRain.Location.X + pictureBoxGrass.Size.Width + 10, pictureBoxRain.Location.Y);
Controls.Add(pictureBoxRain1);

所有其他属性从 pictureBoxRain 完美复制到 pictureBoxRain1,但图像不想显示。问题在哪里?我检查了许多变体,例如从 Properties.Resources 复制图像,直接从文件和其他一些(查看上面代码中的注释)读取,但没有任何效果。

编辑

检查pictureBoxRain1.SizeMode