title: Cannot implicity convert type 'string' to 'System.Windows.Forms.ColumnHeader
body: <p>I am new to Visual Studio 2010 C#. I already created a form. However, when I run the application there is an error occurred stating that <code>"Cannot implicity convert type 'string' to 'System.Windows.Forms.ColumnHeader'"</code>. Can someone tell me what happened and how can I resolve this issue? Thanks.</p>
  
  <p><img src="https://i.stack.imgur.com/vm2vs.png" alt="enter image description here"></p>