title: DataGrid: How to test if a column exists in a datagrid
body: <p>I have a datagrid that I want to pass in a generic collection. On mouseover I want to test if the row has a specific column and return the value.</p>
  
  <p>What I am trying to accomplish is to determine the type of objects in the grid based on the existence of a specific column. For example, if "SerialNo" exists I know the grid is currently holding a collection of Widgets. If "CustomerId" exists I know the grid is currently holding customers.</p>