C# 获得资源文件下图片的路径

最终实现正确的代码是：

button8.Image = System.Drawing.Image.FromFile(@"..\\..\\Resources\\GAOJIBAN.png");

由于 Application.StartupPath 获得的是在bin/bug 路径下 所以要../../返回上级目录
string str = Application.StartupPath;
MessageBox.Show(str);

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这些都是自己试验过的失败品：

//button8.BackgroundImage = System.Drawing.Bitmap.FromFile("C:\\Users\\admin\\Desktop\\ok图片\\初级.png");
//button8.BackgroundImage = System.Drawing.Image.FromFile(@"C:\Users\admin\Desktop\ok\1.png");

//button8.BackgroundImage = System.Drawing.Bitmap.FromFile("C:\\Users\\admin\\Desktop\\ok图片\\高级版.png");
// "F:\\test\\SetIcon\\images2\\App.ico"
// C:\\Users\\admin\\Desktop\\ok图片\\高级版.ico
// ../UI/IMAGES/高级版.png
// "C:\\Users\\admin\\Desktop\\ok\\2.png"
// ..\\Resources\\GAOJIBAN.png
// C:\\Users\\admin\\Desktop\\ok\\2.png
//Application.startup+"\\"+ImageName
// "..\\..\\images\\lj.jpg"
// @"..\\..\\Images\\高级版.png"
button8.Image = System.Drawing.Image.FromFile(@"..\\..\\Resources\\GAOJIBAN.png");
string str = Application.StartupPath;
MessageBox.Show(str);
//button8.Image = Application.StartupPath+"\\"+"GAOJIBAN.png";
//button8.Text = "高级版";
//Application

private void button8_Click(object sender, EventArgs e)
{
//button8.BackgroundImage = System.Drawing.Bitmap.FromFile("C:\\Users\\admin\\Desktop\\ok图片\\高级版.png");
// "F:\\test\\SetIcon\\images2\\App.ico"
// C:\\Users\\admin\\Desktop\\ok图片\\高级版.ico
// ../UI/IMAGES/高级版.png
button8.Image = System.Drawing.Image.FromFile("C:\\Users\\admin\\Desktop\\ok\\2.png");
button8.Text = "高级版";
//MessageBox.Show(button8.Text);
}

private void MainForm_Load(object sender, EventArgs e)
{
//button8.BackgroundImage = System.Drawing.Bitmap.FromFile("C:\\Users\\admin\\Desktop\\ok图片\\初级.png");
//button8.BackgroundImage = System.Drawing.Image.FromFile(@"C:\Users\admin\Desktop\ok\1.png");
//button8.Text = "初级版本";
}