title: Access object without knowing the name beforehand
body: <p>How can I access an object without knowing its name ? (how to concatenate object name).
  I have the following code:</p>
  
  <pre><code>    private void pb1_Click(object sender, EventArgs e)
      {
          Check("1");
      }
  
  
      void Check(string x)
      {   
              if (("pb"+x).Image == img1)
              {
                  ("pb"+x).Image = img2;                    
              }            
      }
  </code></pre>