title: WPF - example with DataGridComboBoxColumn
body: <p>I have a datagrid with 2 columns. One column contains role information, the other column should have a combo box with a list of available users. The data in the combobox is unrelated to the data in the first column. </p>
  
  <p>I'm thrown off by the fact that the combobox does not have a datacontext, only an itemsource and I can't seem to use binding either.</p>
  
  <p>What is the method that uses two different data sets for the data in a table and in the combo box?</p>