I don´t understand the sense of the Column if I set the Width to Auto and the width is based on the column header.
I think that is nonsense. It works in the normal system.windows.controls.grid, it works in your C1DataGrid and only in C1FlexGrid it doesn´t works?!?!
Maybe you can talk to the developer team that they change this.
The problem why I need the flexgrid is a performance problem. With the C1DataGrid it takes twice as long as the flexgrid!!
Regards.