Can I add controls and change parameters to different panels dynamically?

I have a web page with multiple panels that have their Visual parameter set to false.  At run time, I would like to be able to add controls to specifically numbered panels and then change their Visual parameter to true.  I know that I can create a specific panel and add a control to that specific panel with the following C# code:
 
Panel Panel1= new Panel(); Panel1.Controls.Add(myLabel);  
But, I would like to create or just access parameters of a specific panel by referring to it’s ID with a string of characters that are created at run time as with the following C# code?
 
            int i = 1;
      string p = “Panel” + i.ToString();
      p.Controls.Add(myLabel);
      p.Visual = true;
 
Is this possible?