图像没有显示在图片框c#

我想从一个图片框复制图像到另一个。以下代码:

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);

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