Make a resx writer and specify the file to write to : Resx : GUI Windows Forms C# Examples

    
using  System;

using  System.Resources;

using  System.Drawing;
using  System.Collections;
using  System.Windows.Forms;

public  class  MainClass{
    public  static  void  Main(){
        
        ResXResourceWriter  w  =  new  ResXResourceWriter("ResXForm.resx");

        Image  i  =  new  Bitmap("YourFile.bmp");
        w.AddResource("happyDude",  i);
        
        w.AddResource("welcomeString",  "Hello  new  resource  format!");

        w.Generate();
        w.Close();
    }
}