1.使用ResourceManager

string st = Properties.Resources.ResourceManager.GetString(tableName);
value = Properties.Resources.ResourceManager.GetObject(fileName, Properties.Resources.Culture)

public static Bitmap GetImageByName(string imageName)
{
System.Reflection.Assembly asm = System.Reflection.Assembly.GetExecutingAssembly();
string resourceName = asm.GetName().Name + ".Properties.Resources";
var rm = new System.Resources.ResourceManager(resourceName, asm);
return (Bitmap)rm.GetObject(imageName);

}

2. 使用反射

var type = typeof(Properties.Resources);
var property = type.GetProperty(fileName, BindingFlags.Static| BindingFlags.NonPublic|BindingFlags.Public);
var value = property.GetValue(null, null);