title: DataGrid UI virtualization
body: <p>i have a DataGrid. And a bind a List&lt;> to it and add at runtime in the code a few columns. After adding this columns the vertical scrolling isn't very good. The added columns in code are dynamic created, i think between 10 - 50. And there are about 140 rows. How can i fix it?</p>
  
  <p>I read something about ui virtualization, but i dont understand how use it on a DataGrid?
  Can someone help me to finde a solution?</p>
  
  <p>Thanks....</p>