I am working on Arc Objects using C# and I have to make a button add in, such that if I click button one time then layout background color changes to red and then if I click again then button add in change the background color from red to blue in Arc Map. I have successfully changed layout background color to red and blue but I want that color keep changing on each click from red to blue and then from blue to green. Any help will be highly appreciated: Here is my code: using ESRI.ArcGIS.Framework; using ESRI.ArcGIS.esriSystem; using ESRI.ArcGIS.Display; using ESRI.ArcGIS.Desktop.AddIns; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.ArcMapUI; using System; using System.Collections.Generic; using System.Text; using System.IO;

namespace lecture5test { public class Button1 : ESRI.ArcGIS.Desktop.AddIns.Button { public Button1() {

    }
    protected override void OnClick()
    {
        //
        //  TODO: Sample code showing how to access button host
        //
       
        ArcMap.Application.CurrentTool = null;
       
        RgbColor r = new RgbColor();
        IRgbColor iRgb = (IRgbColor)r;
        iRgb.Red = 255;
        iRgb.Green = 0;
        iRgb.Blue = 0;
        IColor ic = (IColor)r;
        // Page iPl = ArcMap.Document.PageLayout;
        IPageLayout iPl = ArcMap.Document.PageLayout;
        IPage pPage = (IPage)iPl.Page;

        RgbColor b = new RgbColor();
        IRgbColor bRgb = (IRgbColor)b;
        bRgb.Red = 0;
        bRgb.Green = 0;
        bRgb.Blue = 255;
        IColor ib = (IColor)b;

        RgbColor g = new RgbColor();
        IRgbColor gRgb = (IRgbColor)g;
        gRgb.Red = 0;
        gRgb.Green = 255;
        gRgb.Blue = 0;
        IColor ig = (IColor)g;

        pPage.BackgroundColor = ic;
        pPage.BackgroundColor = ib;
        pPage.BackgroundColor = ig;
     
       
    }

    private void EnableDynamicDisplay()
    {
        throw new NotImplementedException();
    }
    protected override void OnUpdate()
    {
        Enabled = ArcMap.Application != null;
        
    }
    
}

}

I am working on Arc Objects using C# and I have to make a button add in, such that if I click button one time then layout background color changes to red and then if I click again then button add in change the background color from red to blue in Arc Map. I have successfully changed layout background color to red and blue but I want that color keep changing on each click from red to blue and then from blue to green.

Here is my code:

using ESRI.ArcGIS.Framework;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Desktop.AddIns;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.ArcMapUI;
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace lecture5test
{
    public class Button1 : ESRI.ArcGIS.Desktop.AddIns.Button
    {
        public Button1()
        {
           
        }
        protected override void OnClick()
        {
            //
            //  TODO: Sample code showing how to access button host
            //
           
            ArcMap.Application.CurrentTool = null;
           
            RgbColor r = new RgbColor();
            IRgbColor iRgb = (IRgbColor)r;
            iRgb.Red = 255;
            iRgb.Green = 0;
            iRgb.Blue = 0;
            IColor ic = (IColor)r;
            // Page iPl = ArcMap.Document.PageLayout;
            IPageLayout iPl = ArcMap.Document.PageLayout;
            IPage pPage = (IPage)iPl.Page;
    
            RgbColor b = new RgbColor();
            IRgbColor bRgb = (IRgbColor)b;
            bRgb.Red = 0;
            bRgb.Green = 0;
            bRgb.Blue = 255;
            IColor ib = (IColor)b;

            RgbColor g = new RgbColor();
            IRgbColor gRgb = (IRgbColor)g;
            gRgb.Red = 0;
            gRgb.Green = 255;
            gRgb.Blue = 0;
            IColor ig = (IColor)g;

            pPage.BackgroundColor = ic;
            pPage.BackgroundColor = ib;
            pPage.BackgroundColor = ig;
         
           
        }

        private void EnableDynamicDisplay()
        {
            throw new NotImplementedException();
        }
        protected override void OnUpdate()
        {
            Enabled = ArcMap.Application != null;
            
        }
        
    }

}