1) Embedded Resource (Build Action 設置為 Embedded Resource) 在運行時使用GetManifestResourceStream讀取
Image.FromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream("WindowsFormsApplication1.Properties.Resources.warning.png"));
2) Resource (Build Action 設置為 Resource) 在運行時使用 Resource Manager讀取
ResourceManager rm = new ResourceManager("WindowsFormsApplication1.g", typeof(Form1).Assembly);
Image warImg = null;
ResourceSet rs= rm.GetResourceSet(new System.Globalization.CultureInfo("en"),true,true);
foreach (DictionaryEntry item in rs)
{
Console.WriteLine(item.Key.ToString());
warImg = Bitmap.FromStream(item.Value as Stream);
}
3) 如果是直接添加圖片到.Resx資源文件中，在運行時使用Resource Manager讀取， 但讀取方式有不同
ResourceManager rm = new ResourceManager("WindowsFormsApplication1.Properties.Resources", typeof(Form1).Assembly);
Bitmap warnImg = rm.GetObject("warning") as Bitmap;
以上是WinForm 和 WPF下的情況，在ASP.NET下還有另外一種嵌入資源方式，通過WebResourceAttribute, NOTE: 這里的image的build action必須是Embedded Resource.
添加 assembly attribute：
[assembly: WebResourceAttribute("ServerControl1.images.component.gif", "image/gif")]
客戶端讀取：
string imgURL = Page.ClientScript.GetWebResourceUrl(typeof(ServerControl1), ("ServerControl1.images.component.gif");