asp.net - how can declare variable of -

How to and can declare a variable type

  & lt; Div id = "b" runat = "server" / & gt;   
 code  
 get  (b); Get private zero (& lt; div & gt; d) {d.Visible = false; }   
 Can I do this work? How to <...   
 
 
 Use to declare a device on the server side.  
  var div = new System.Web.UI.HtmlControls.HtmlGenericControl ("div");   
 The answer is still the same, use a HtmlGenericControl.  
  Get Private Zero (HtmlGenericControl D) {d.Visible = false; }