Hi Mate,
Thank you for Contacting Syncfusion support.
In MultiColumnTreeView control, Dotted selection line can be removed when its Style is set as Metro.
Please make use of the Below Code Example
Code Example [C#]
//Remove Dotted Border using Metro Style.
this.multiColumnTreeView1.Style = Syncfusion.Windows.Forms.Tools.MultiColumnTreeView.MultiColumnVisualStyle.Metro;
|
Please refer the below Screenshot.
Screenshot
We have also prepared the sample for your reference, it can be downloaded from the below link.
Please let us know if it is helpful.
Regards,
Mallika