hi if you don't know the count of buttons you will use write it dynamic private object lastButton; private void SetButtonColor(object sender) { if(lastButton != null && lastButton != sender) { lastButton.BackColor = Color.White; } sender.BackColor = Color.Blue; lastButton = sender; ... }

Hi, Actually I am developing a tool to check the performance of a site. so whenever I enter a site I want to know is the contents of the url are present in cache or not and if present want to display the contents. So do you have any idea about it. I want to do this in c#.