title: Difference in Double & double
body: <p>I am confuse in term of lower-case double and upper-case Double.<br>
  what is the difference between double/Double... ?</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  
  namespace test
  {
       static void Main(string[] args)
          {
              Double a = 100;
              double b = 200;
  
              Console.Write("{0},{1}",a,b);
          }
  
      }
  }
  </code></pre>
  
  <p>Both do same work,so why looking different i.e, Double and double...?</p>