'Declaration
Public Property ShowVerticalFreezingSeparator As DataGridColumnFreezing
public DataGridColumnFreezing ShowVerticalFreezingSeparator {get; set;}
'Declaration
Public Property ShowVerticalFreezingSeparator As DataGridColumnFreezing
public DataGridColumnFreezing ShowVerticalFreezingSeparator {get; set;}
If you want to prevent the user from changing the amount of frozen columns you should set the property CanUserFreezeColumns to None.
Additionally you can change the width of the separator by changing the property VerticalFreezingSeparatorWidth.